diff --git a/chemistry/ta4_liquid_filter.lua b/chemistry/ta4_liquid_filter.lua
new file mode 100644
index 0000000..8d4f543
--- /dev/null
+++ b/chemistry/ta4_liquid_filter.lua
@@ -0,0 +1,220 @@
+--[[
+
+	TechAge
+	=======
+
+	Copyright (C) 2019-2020 Joachim Stolberg
+	Copyright (C) 2020 Thomas S.
+
+	GPL v3
+	See LICENSE.txt for more information
+	
+	TA4 Liquid Filter
+
+]]--
+
+-- For now, the Red Mud -> Lye/Desert Cobble recipe is hardcoded.
+-- If necessary, this can be adjusted later.
+
+local M = minetest.get_meta
+local S = techage.S
+local Pipe = techage.LiquidPipe
+local liquid = techage.liquid
+
+-- Checks if the filter structure is ok and returns the amount of gravel
+local function checkStructure(pos)
+	local pos1_outer = {x=pos.x-2,y=pos.y-7,z=pos.z-2}
+	local pos2_outer = {x=pos.x+2,y=pos.y,z=pos.z+2}
+	local pos1_inner = {x=pos.x-1,y=pos.y-1,z=pos.z-1}
+	local pos2_inner = {x=pos.x+1,y=pos.y-7,z=pos.z+1}
+	local pos1_top = {x=pos.x-1,y=pos.y,z=pos.z-1}
+	local pos2_top = {x=pos.x+1,y=pos.y,z=pos.z+1}
+	local pos1_bottom = {x=pos.x-2,y=pos.y-8,z=pos.z-2}
+	local pos2_bottom = {x=pos.x+2,y=pos.y-8,z=pos.z+2}
+
+
+	local gravel = minetest.find_nodes_in_area(pos1_inner, pos2_inner, {"default:gravel"})
+
+	local _, inner = minetest.find_nodes_in_area(pos1_inner, pos2_inner, {
+		"default:desert_cobble"
+	})
+	if #gravel + (inner["default:desert_cobble"] or 0) ~= 63 then -- 7x3x3=63
+		return false, gravel
+	end
+
+	local _, outer = minetest.find_nodes_in_area(pos1_outer, pos2_outer, {
+		"basic_materials:concrete_block",
+		"default:obsidian_glass"
+	})
+
+	-- +      4x7=28 (corners)
+	-- +  5x5-3x3=16 (top ring)
+	-- ------------------------------
+	-- =          44 (total concrete)
+	if outer["basic_materials:concrete_block"] ~= 44 then
+		return false, gravel
+	end
+	if outer["default:obsidian_glass"] ~= 84 then -- 4x7x3=84
+		return false, gravel
+	end
+
+	local _,top = minetest.find_nodes_in_area(pos1_top, pos2_top, {"air"})
+	if top["air"] ~= 8 then
+		return false, gravel
+	end
+
+	local _,bottom = minetest.find_nodes_in_area(pos1_bottom, pos2_bottom, {
+		"basic_materials:concrete_block",
+		"techage:ta3_pipe_wall_entry"
+	})
+	if bottom["basic_materials:concrete_block"] ~= 22 or bottom["techage:ta3_pipe_wall_entry"] ~= 2 then
+		return false, gravel
+	end
+
+	if minetest.get_node({x=pos.x,y=pos.y-8,z=pos.z}).name ~= "techage:ta4_liquid_filter_sink" then
+		return false, gravel
+	end
+
+	return true, gravel
+end
+
+minetest.register_node("techage:ta4_liquid_filter_filler", {
+	description = S("TA4 Liquid Filter Filler"),
+	tiles = {
+		-- up, down, right, left, back, front
+		"basic_materials_concrete_block.png^techage_gaspipe_hole.png",
+		"basic_materials_concrete_block.png^techage_liquid_filter_filler_bottom.png",
+		"basic_materials_concrete_block.png^techage_liquid_filter_filler.png",
+	},
+	drawtype = "nodebox",
+	node_box = {
+		type = "fixed",
+		fixed = {
+			{-6/8, -0.5, -6/8, 6/8, -0.25, 6/8},
+			{-7/16, -0.25, -7/16, 7/16, 0, 7/16},
+			{-1/8, 0, -1/8, 1/8, 13/32, 1/8},
+			{-2/8, 13/32, -2/8, 2/8, 0.5, 2/8},
+		},
+	},
+	after_place_node = function(pos)
+		Pipe:after_place_node(pos)
+	end,
+	tubelib2_on_update2 = function(pos, dir, tlib2, node)
+		liquid.update_network(pos)
+	end,
+	after_dig_node = function(pos, oldnode, oldmetadata, digger)
+		Pipe:after_dig_node(pos)
+	end,
+
+	paramtype = "light",
+	paramtype2 = "facedir",
+	on_rotate = screwdriver.disallow,
+	groups = {cracky=2},
+	is_ground_content = false,
+	sounds = default.node_sound_metal_defaults(),
+
+
+	liquid = {
+		capa = 1,
+		peek = function(...) return nil end,
+		put = function(pos, indir, name, amount)
+			local structure_ok, gravel = checkStructure(pos)
+			if name ~= "techage:redmud" then
+				return amount
+			end
+			if not structure_ok then
+				return amount
+			end
+			if #gravel < 33 then
+				return amount
+			end
+			if math.random() < 0.5 then
+				local leftover = liquid.put({x=pos.x,y=pos.y-8,z=pos.z}, 2, "techage:lye", 1)
+				if leftover > 0 then
+					return amount
+				end
+			else
+				minetest.swap_node(gravel[math.random(#gravel)], {name = "default:desert_cobble"})
+			end
+			return amount - 1
+		end,
+		take = function(...) return 0 end,
+		untake = function(pos, outdir, name, amount, player_name)
+			return amount
+		end,
+	},
+
+	networks = {
+		pipe2 = {
+			sides = {U = 1}, -- Pipe connection sides
+			ntype = "tank",
+		},
+	},
+})
+
+minetest.register_node("techage:ta4_liquid_filter_sink", {
+	description = S("TA4 Liquid Filter Sink"),
+	tiles = {
+		-- up, down, right, left, back, front
+		"basic_materials_concrete_block.png^techage_appl_arrow.png",
+		"basic_materials_concrete_block.png",
+		"basic_materials_concrete_block.png^techage_appl_hole_pipe.png",
+		"basic_materials_concrete_block.png",
+		"basic_materials_concrete_block.png",
+		"basic_materials_concrete_block.png",
+	},
+	drawtype = "nodebox",
+	node_box = {
+		type = "fixed",
+		fixed = {
+			{-0.5, -0.5, -0.5, 0.5, 3/16, 0.5},
+			{-0.5, 3/16, -0.5, 0.5, 5/16, -0.25},
+			{0.25, 3/16, -0.5, 0.5, 5/16, 0.5},
+			{-0.5, 3/16, 0.25, 0.5, 5/16, 0.5},
+			{-0.5, 3/16, -0.5, -0.25, 5/16, 0.5}
+		},
+	},
+	after_place_node = function(pos)
+		Pipe:after_place_node(pos)
+	end,
+	tubelib2_on_update2 = function(pos, dir, tlib2, node)
+		liquid.update_network(pos)
+	end,
+	after_dig_node = function(pos, oldnode, oldmetadata, digger)
+		Pipe:after_dig_node(pos)
+	end,
+
+	paramtype = "light",
+	paramtype2 = "facedir",
+	on_rotate = screwdriver.disallow,
+	groups = {cracky=2},
+	is_ground_content = false,
+	sounds = default.node_sound_metal_defaults(),
+
+	networks = {
+		pipe2 = {
+			sides = {R = 1}, -- Pipe connection sides
+			ntype = "pump",
+		},
+	},
+})
+
+Pipe:add_secondary_node_names({"techage:ta4_liquid_filter_filler", "techage:ta4_liquid_filter_sink"})
+
+minetest.register_craft({
+	output = 'techage:ta4_liquid_filter_filler',
+	recipe = {
+		{'', 'techage:ta3_pipeS', ''},
+		{'basic_materials:concrete_block', 'basic_materials:concrete_block', 'basic_materials:concrete_block'},
+		{'', 'default:steel_ingot', ''},
+	}
+})
+
+minetest.register_craft({
+	output = 'techage:ta4_liquid_filter_sink 2',
+	recipe = {
+		{'basic_materials:concrete_block', '', 'basic_materials:concrete_block'},
+		{'basic_materials:concrete_block', 'techage:ta3_pipeS', 'techage:ta3_pipeS'},
+		{'basic_materials:concrete_block', 'basic_materials:concrete_block', 'basic_materials:concrete_block'},
+	}
+})
\ No newline at end of file
diff --git a/doc/items.lua b/doc/items.lua
index ef5ac6b..034fd1c 100644
--- a/doc/items.lua
+++ b/doc/items.lua
@@ -172,5 +172,6 @@ techage.Items = {
 	ta4_quarry = "techage:ta4_quarry_pas",
 	ta4_electronicfab = "techage:ta4_electronic_fab_pas",
 	ta4_injector = "techage:ta4_injector_pas",
+	ta4_liquid_filter = "techage_ta4_filter.png",
 	--ta4_ "", 
 }
diff --git a/doc/manual_DE.lua b/doc/manual_DE.lua
index 6039266..1761303 100644
--- a/doc/manual_DE.lua
+++ b/doc/manual_DE.lua
@@ -170,6 +170,10 @@ techage.manual_DE.aTitel = {
   "3,TA4 LED Pflanzenlampe / TA4 LED Grow Light",
   "3,TA4 LED Straßenlampe / TA4 LED Street Lamp",
   "3,TA4 LED Industrielampe / TA4 LED Industrial Lamp",
+  "2,TA4 Flüssigkeitsfilter",
+  "3,Fundament-Ebene",
+  "3,Schotter-Ebene",
+  "3,Einfüll-Ebene",
   "2,Weitere TA4 Blöcke",
   "3,TA4 Tank / TA4 Tank",
   "3,TA4 Pumpe / TA4 Pump",
@@ -1402,6 +1406,31 @@ techage.manual_DE.aText = {
   "\n"..
   "\n"..
   "\n",
+  "Im Flüssigkeitsfilter wird Rotschlamm gefiltert.\n"..
+  "Dabei entsteht entweder Lauge\\, welche unten in einem Tank gesammelt werden kann oder Wüstenkopfsteinpflaster\\, welches sich im Filter absetzt.\n"..
+  "Wenn der Filter zu sehr verstopft ist\\, muss er geleert und neu befüllt werden.\n"..
+  "Der Filter besteht aus einer Fundament-Ebene\\, auf der 7 identische Filterschichten platziert werden. \n"..
+  "Ganz oben befindet sich die Einfüllebene.\n"..
+  "\n"..
+  "\n"..
+  "\n",
+  "Der Aufbau dieser Ebene kann dem Plan entnommen werden.\n"..
+  "\n"..
+  "Im Tank wird die Lauge gesammelt.\n"..
+  "\n"..
+  "\n"..
+  "\n",
+  "Diese Ebene muss so wie im Plan gezeigt mit Schotter befüllt werden.\n"..
+  "Insgesamt müssen sieben Lagen Schotter übereinander liegen.\n"..
+  "Dabei wird mit der Zeit der Filter verunreinigt\\, sodass das Füllmaterial erneuert werden muss.\n"..
+  "\n"..
+  "\n"..
+  "\n",
+  "Diese Ebene dient zum Befüllen des Filters mit Rotschlamm.\n"..
+  "In den Einfüllstutzen muss Rotschlamm mittels einer Pumpe geleitet werden.\n"..
+  "\n"..
+  "\n"..
+  "\n",
   "",
   "Siehe TA3 Tank.\n"..
   "\n"..
@@ -1678,6 +1707,10 @@ techage.manual_DE.aItemName = {
   "ta4_growlight",
   "ta4_streetlamp",
   "ta4_industriallamp",
+  "ta4_liquid_filter",
+  "",
+  "",
+  "",
   "",
   "ta4_tank",
   "ta4_pump",
@@ -1866,6 +1899,10 @@ techage.manual_DE.aPlanTable = {
   "",
   "",
   "",
+  "ta4_liquid_filter_base",
+  "ta4_liquid_filter_gravel",
+  "ta4_liquid_filter_top",
+  "",
   "",
   "",
   "",
diff --git a/doc/manual_EN.lua b/doc/manual_EN.lua
index 3473f67..4b24d6c 100644
--- a/doc/manual_EN.lua
+++ b/doc/manual_EN.lua
@@ -170,6 +170,10 @@ techage.manual_EN.aTitel = {
   "3,TA4 LED Grow Light",
   "3,TA4 Street Lamp",
   "3,TA4 LED Industrial Lamp",
+  "2,TA4 Liquid Filter",
+  "3,Base Layer",
+  "3,Gravel Layer",
+  "3,Filling Layer",
   "2,More TA4 Blocks",
   "3,TA4 Tank",
   "3,TA4 Pump",
@@ -1393,6 +1397,31 @@ techage.manual_EN.aText = {
   "\n"..
   "\n"..
   "\n",
+  "The liquid filter filters red mud.\n"..
+  "A part of the red mud becomes lye\\, which can be collected at the bottom in a tank.\n"..
+  "The other part becomes desert cobblestone and clutters the filter material.\n"..
+  "If the filter is too clogged\\, it has to be cleaned and re-filled.\n"..
+  "The filter consists of a base layer\\, 7 identical filter layers and a filling layer at the top.\n"..
+  "\n"..
+  "\n"..
+  "\n",
+  "You can see the structure of this layer in the plan.\n"..
+  "\n"..
+  "The lye is collected in the tank.\n"..
+  "\n"..
+  "\n"..
+  "\n",
+  "This layer has to be filled with gravel as shown in the plan.\n"..
+  "In total\\, there must be seven layers of gravel.\n"..
+  "The filter will become cluttered over time\\, so that it has to be cleaned and re-filled.\n"..
+  "\n"..
+  "\n"..
+  "\n",
+  "This layer is used to fill the filter with red mud.\n"..
+  "The red mud must be pumped into the filler pipe.\n"..
+  "\n"..
+  "\n"..
+  "\n",
   "",
   "See TA3 tank.\n"..
   "\n"..
@@ -1669,6 +1698,10 @@ techage.manual_EN.aItemName = {
   "ta4_growlight",
   "ta4_streetlamp",
   "ta4_industriallamp",
+  "ta4_liquid_filter",
+  "",
+  "",
+  "",
   "",
   "ta4_tank",
   "ta4_pump",
@@ -1857,6 +1890,10 @@ techage.manual_EN.aPlanTable = {
   "",
   "",
   "",
+  "ta4_liquid_filter_base",
+  "ta4_liquid_filter_gravel",
+  "ta4_liquid_filter_top",
+  "",
   "",
   "",
   "",
diff --git a/doc/plans.lua b/doc/plans.lua
index 73b0289..4af9460 100644
--- a/doc/plans.lua
+++ b/doc/plans.lua
@@ -23,6 +23,7 @@ local IMG_4 = {"", "techage_ta4.png"}
 local IMG41 = {"", "techage_ta4_tes.png"}
 local IMG42 = {"", "techage_ta4_solar.png"}
 local IMG43 = {"", "techage_reactor_inv.png"}
+local IMG44 = {"", "techage_ta4_filter.png"}
 
 --
 -- TA1: Coal Pile
@@ -172,7 +173,7 @@ techage.ConstructionPlans["ta3_furnace"] = {
 -- TA3 Tank Pump Pusher
 --
 local Pump = {"techage_filling_ta3.png^techage_appl_pump.png^techage_frame_ta3.png", "techage:t3_pump"}
-local Tank = {"techage_filling_ta3.png^techage_frame_ta3.png^techage_appl_tank.png", "techage:ta3_tank"}
+local TANK3 = {"techage_filling_ta3.png^techage_frame_ta3.png^techage_appl_tank.png", "techage:ta3_tank"}
 local Fillr = {"techage_filling_ta3.png^techage_appl_liquid_hopper.png^techage_frame_ta3.png", "techage:filler"}
 local PIPEH = {"techage_gaspipe.png", "techage:ta4_pipeS"}
 local PIPEV = {"techage_gaspipe.png^[transformR90", "techage:ta4_pipeS"}
@@ -184,7 +185,7 @@ local PN270 = {"techage_gaspipe_knee.png^[transformR270", "techage:ta4_pipeS"}
 techage.ConstructionPlans["ta3_tank"] = {
 	{false, false, false, false, false, false, false, false, false, false},
 	{false, Tubes, PushR, Tubes, Fillr, Tubes, PushR, Tubes, false, false},
-	{false, false, false, false, Tank,  PIPEH, PIPEH, Pump,  PIPEH, Tank},
+	{false, false, false, false, TANK3, PIPEH, PIPEH, Pump,  PIPEH, Tank},
 	{false, false, false, false, false, false, false, false, false, false},
 }
 
@@ -205,7 +206,7 @@ local BUFFR = {"default_junglewood.png^minecart_buffer.png", "minecart:buffer"}
 techage.ConstructionPlans["ta3_loading"] = {
 	{false, false, PIPEH, Pump,  PIPEH, PN270, false, false, false, false, false},
 	{false, false, false, false, false, PIPEV, false, false, false, false, false},
-	{false, MCART, false, false, false, PN090, Tank,  false, false, false, false},
+	{false, MCART, false, false, false, PN090, TANK3, false, false, false, false},
 	{false, HOPPR, CHEST, Tubes, PushR, Tubes, Fillr, PushR, Tubes, MCART, false},
 	{false, false, false, false, false, false, false, false, false, false, false},
 	{false, false, false, false, false, false, false, false, false, false, false},
@@ -226,16 +227,16 @@ local DBASE = {"techage_concrete.png", "techage:ta3_distiller_base"}
 local REBIO = {"techage_filling_ta3.png^techage_appl_reboiler.png^techage_frame_ta3.png", "techage:ta3_reboiler"}
 
 techage.ConstructionPlans["ta3_distiller"] = {
-	{false, false, false, false, false, false, false, PN000, PIPEH, Tank,  false},
+	{false, false, false, false, false, false, false, PN000, PIPEH, TANK3, false},
 	{false, IMG31, false, false, false, false, false, DIST4, false, false, false},
-	{false, false, false, false, false, false, false, DIST3, PIPEH, Tank,  false},
+	{false, false, false, false, false, false, false, DIST3, PIPEH, TANK3, false},
 	{false, false, false, false, false, false, false, DIST2, false, false, false},
-	{false, false, false, false, false, false, false, DIST3, PIPEH, Tank,  false},
+	{false, false, false, false, false, false, false, DIST3, PIPEH, TANK3, false},
 	{false, false, false, false, false, false, false, DIST2, false, false, false},
-	{false, false, false, false, false, false, false, DIST3, PIPEH, Tank,  false},
+	{false, false, false, false, false, false, false, DIST3, PIPEH, TANK3, false},
 	{false, false, false, false, false, false, false, DIST2, false, false, false},
-	{false, Tank,  PIPEH, Pump,  PIPEH, REBIO, PIPEH, DIST1, false, false, false},
-	{false, false, false, false, false, false, false, DBASE, PIPEH, Tank,  false},
+	{false, TANK3, PIPEH, Pump,  PIPEH, REBIO, PIPEH, DIST1, false, false, false},
+	{false, false, false, false, false, false, false, DBASE, PIPEH, TANK3, false},
 }
 
 --
@@ -255,7 +256,7 @@ techage.ConstructionPlans["ta4_reactor"] = {
 	{false, false, false, false, PIPEV, false, false, FILLR, false, false, false},
 	{false, false, false, false, PIPEV, false, false, REACT, false, false, false},
 	{false, false, false, false, PIPEV, false, false, STAND, PIPEH, PIPEH, SILO},
-	{false, Tank,  PIPEH, PIPEH, DOSER, PN270, false, RBASE, PIPEH, PIPEH, Tank},
+	{false, TANK3, PIPEH, PIPEH, DOSER, PN270, false, RBASE, PIPEH, PIPEH, Tank},
 	{false, SILO,  PIPEH, PIPEH, PIPEH, PN180, false, false, false, false, false},
 }
 
@@ -322,4 +323,44 @@ techage.ConstructionPlans["ta4_solarplant"] = {
 }
 
 
+--
+-- Liquid Filter
+--
 
+local LFSNK = {"basic_materials_concrete_block.png^techage_appl_arrow.png", "techage:ta4_liquid_filter_sink"}
+local PWETR = {"basic_materials_concrete_block.png^techage_gaspipe.png", "techage:ta3_pipe_wall_entry"}
+local TANK4 = {"techage_filling_ta4.png^techage_frame_ta4.png^techage_appl_tank.png", "techage:ta4_tank"}
+local LFFIL = {"basic_materials_concrete_block.png^techage_gaspipe_hole.png", "techage:ta4_liquid_filter_filler"}
+
+techage.ConstructionPlans["ta4_liquid_filter_base"] = {
+	{false, false, false, false, false, false, false, false, IMG44, false},
+	{false, false, false, false, false, false, false, false, false, false},
+	{false, false, false, false, false, false, false, false, false, false},
+	{false, CONCR, CONCR, CONCR, CONCR, CONCR},
+	{false, CONCR, CONCR, CONCR, CONCR, CONCR},
+	{false, CONCR, CONCR, LFSNK, PWETR, PWETR, PIPEH, PIPEH, TANK4},
+	{false, CONCR, CONCR, CONCR, CONCR, CONCR},
+	{false, CONCR, CONCR, CONCR, CONCR, CONCR},
+}
+
+techage.ConstructionPlans["ta4_liquid_filter_gravel"] = {
+	{false, false, false, false, false, false, false, false, IMG44, false},
+	{false, false, false, false, false, false, false, false, false, false},
+	{false, false, false, false, false, false, false, false, false, false},
+	{false, CONCR, OGLAS, OGLAS, OGLAS, CONCR},
+	{false, OGLAS, GRAVL, GRAVL, GRAVL, OGLAS},
+	{false, OGLAS, GRAVL, GRAVL, GRAVL, OGLAS},
+	{false, OGLAS, GRAVL, GRAVL, GRAVL, OGLAS},
+	{false, CONCR, OGLAS, OGLAS, OGLAS, CONCR},
+}
+
+techage.ConstructionPlans["ta4_liquid_filter_top"] = {
+	{false, false, false, false, false, false, false, false, IMG44, false},
+	{false, false, false, false, false, false, false, false, false, false},
+	{false, false, false, false, false, false, false, false, false, false},
+	{false, CONCR, CONCR, CONCR, CONCR, CONCR},
+	{false, CONCR, false, false, false, CONCR},
+	{false, CONCR, false, LFFIL, false, CONCR},
+	{false, CONCR, false, false, false, CONCR},
+	{false, CONCR, CONCR, CONCR, CONCR, CONCR},
+}
\ No newline at end of file
diff --git a/icta_controller/battery.lua b/icta_controller/battery.lua
index 9f1a4f7..7d3f262 100644
--- a/icta_controller/battery.lua
+++ b/icta_controller/battery.lua
@@ -94,7 +94,7 @@ minetest.register_node("techage:ta4_battery", {
 	paramtype = "light",
 	sunlight_propagates = true,
 	paramtype2 = "facedir",
-	groups = {choppy=1, cracky=1, crumbly=1, not_in_creative_inventory=nici},
+	groups = {choppy=1, cracky=1, crumbly=1},
 	is_ground_content = false,
 	sounds = default.node_sound_stone_defaults(),
 })
diff --git a/init.lua b/init.lua
index 6c94bd5..d6b1b85 100644
--- a/init.lua
+++ b/init.lua
@@ -271,6 +271,7 @@ dofile(MP.."/energy_storage/nodes.lua")
 dofile(MP.."/chemistry/ta4_reactor.lua")
 dofile(MP.."/chemistry/ta4_stand.lua")
 dofile(MP.."/chemistry/ta4_doser.lua")
+dofile(MP.."/chemistry/ta4_liquid_filter.lua")
 
 -- Hydrogen
 dofile(MP.."/hydrogen/fuelcellstack.lua")
diff --git a/liquids/pump.lua b/liquids/pump.lua
index a01c36e..45fc50b 100644
--- a/liquids/pump.lua
+++ b/liquids/pump.lua
@@ -69,10 +69,12 @@ local function pumping(pos, nvm, state, capa)
 	local taken, name = liquid.take(pos, Flip[outdir], nil, capa, starter)
 	if taken > 0 then
 		local leftover = liquid.put(pos, outdir, name, taken, starter)
-		if leftover and leftover == taken then
+		if leftover then
 			liquid.untake(pos, Flip[outdir], name, leftover)
-			state:blocked(pos, nvm)
-			return
+			if leftover == taken then
+				state:blocked(pos, nvm)
+				return
+			end
 		end
 		state:keep_running(pos, nvm, COUNTDOWN_TICKS)
 		return
diff --git a/locale/techage.de.tr b/locale/techage.de.tr
index 21ae9dc..6d139ab 100644
--- a/locale/techage.de.tr
+++ b/locale/techage.de.tr
@@ -329,6 +329,8 @@ TA4 LED Street Lamp=TA4 LED Straßenlampe
 TA4 LED Street Lamp Arm=TA4 LED Lampenarm
 TA4 LED Street Lamp Pole=TA4 LED Lampenmast
 TA4 LEDs=TA4 LEDs
+TA4 Liquid Filter Filler=TA4 Flüssigkeitsfilter Einfüllstutzen
+TA4 Liquid Filter Sink=TA4 Flüssigkeitsfilter Abfluss
 TA4 Low Power Box=TA4 Niederspannungsverteilerbox
 TA4 Low Power Cable=TA4 Niederspannungskabel
 TA4 Pillar=TA4 Säule
diff --git a/locale/template.txt b/locale/template.txt
index 2d9530a..31ccf96 100644
--- a/locale/template.txt
+++ b/locale/template.txt
@@ -327,6 +327,8 @@ TA4 LED Street Lamp=
 TA4 LED Street Lamp Arm=
 TA4 LED Street Lamp Pole=
 TA4 LEDs=
+TA4 Liquid Filter Filler=
+TA4 Liquid Filter Sink=
 TA4 Low Power Box=
 TA4 Low Power Cable=
 TA4 Pillar=
diff --git a/manuals/manual_ta4_DE.md b/manuals/manual_ta4_DE.md
index 178c703..2afd3da 100644
--- a/manuals/manual_ta4_DE.md
+++ b/manuals/manual_ta4_DE.md
@@ -474,6 +474,42 @@ Die Lampe benötigt 1 ku Strom.
 
 
 
+## TA4 Flüssigkeitsfilter
+
+Im Flüssigkeitsfilter wird Rotschlamm gefiltert.
+Dabei entsteht entweder Lauge, welche unten in einem Tank gesammelt werden kann oder Wüstenkopfsteinpflaster, welches sich im Filter absetzt.
+Wenn der Filter zu sehr verstopft ist, muss er geleert und neu befüllt werden.
+Der Filter besteht aus einer Fundament-Ebene, auf der 7 identische Filterschichten platziert werden. 
+Ganz oben befindet sich die Einfüllebene.
+
+[ta4_liquid_filter|image]
+
+### Fundament-Ebene
+
+Der Aufbau dieser Ebene kann dem Plan entnommen werden.
+
+Im Tank wird die Lauge gesammelt.
+
+[ta4_liquid_filter_base|plan]
+
+### Schotter-Ebene
+
+Diese Ebene muss so wie im Plan gezeigt mit Schotter befüllt werden.
+Insgesamt müssen sieben Lagen Schotter übereinander liegen.
+Dabei wird mit der Zeit der Filter verunreinigt, sodass das Füllmaterial erneuert werden muss.
+
+[ta4_liquid_filter_gravel|plan]
+
+### Einfüll-Ebene
+
+Diese Ebene dient zum Befüllen des Filters mit Rotschlamm.
+In den Einfüllstutzen muss Rotschlamm mittels einer Pumpe geleitet werden.
+
+[ta4_liquid_filter_top|plan]
+
+
+
+
 ## Weitere TA4 Blöcke
 
 ### TA4 Tank / TA4 Tank
diff --git a/manuals/manual_ta4_EN.md b/manuals/manual_ta4_EN.md
index 665ca46..8ae2363 100644
--- a/manuals/manual_ta4_EN.md
+++ b/manuals/manual_ta4_EN.md
@@ -475,6 +475,42 @@ The lamp requires 1 ku of electricity.
 
 
 
+## TA4 Liquid Filter
+
+The liquid filter filters red mud.
+A part of the red mud becomes lye, which can be collected at the bottom in a tank.
+The other part becomes desert cobblestone and clutters the filter material.
+If the filter is too clogged, it has to be cleaned and re-filled.
+The filter consists of a base layer, 7 identical filter layers and a filling layer at the top.
+
+[ta4_liquid_filter|image]
+
+### Base Layer
+
+You can see the structure of this layer in the plan.
+
+The lye is collected in the tank.
+
+[ta4_liquid_filter_base|plan]
+
+### Gravel Layer
+
+This layer has to be filled with gravel as shown in the plan.
+In total, there must be seven layers of gravel.
+The filter will become cluttered over time, so that it has to be cleaned and re-filled.
+
+[ta4_liquid_filter_gravel|plan]
+
+### Filling Layer
+
+This layer is used to fill the filter with red mud.
+The red mud must be pumped into the filler pipe.
+
+[ta4_liquid_filter_top|plan]
+
+
+
+
 ## More TA4 Blocks
 
 ### TA4 Tank
diff --git a/manuals/markdown2formspec.py b/manuals/markdown2formspec.py
index aee6ebb..72df37b 100644
--- a/manuals/markdown2formspec.py
+++ b/manuals/markdown2formspec.py
@@ -190,7 +190,7 @@ class MyRenderer(mistune.Renderer):
         return "\\n"
 
     def inline_html(self, text):
-        print text
+        print(text)
     # ~ 
     # ~ double_emphasis(text)
     # ~ image(src, title, alt_text)
@@ -207,7 +207,7 @@ def parse_md_file(src_name, mod, manual):
     inline.enable_wiki_link()
     md = mistune.Markdown(renderer=renderer, inline=inline)
     md.renderer.src_name = src_name
-    md.render(file(src_name).read())
+    md.render(open(src_name, 'r').read())
     md.renderer.add_last_paragraph()
 
 def gen_lua_file(dest_name):
@@ -217,7 +217,7 @@ def gen_lua_file(dest_name):
     lOut.append(lua_text_table("%s.%s.aText" % (mod, manual), lText))
     lOut.append(lua_table("%s.%s.aItemName" % (mod, manual), lItemName))
     lOut.append(lua_table("%s.%s.aPlanTable" % (mod, manual), lPlanTable))
-    file(dest_name, "w").write("".join(lOut))
+    open(dest_name, "w").write("".join(lOut))
     
 def gen_toc_md_file(dest_name, titel, level_range=[1,6]):
     print("Write MD file '%s'" % dest_name)
@@ -228,7 +228,7 @@ def gen_toc_md_file(dest_name, titel, level_range=[1,6]):
             list_item = "    " * (item["level"] - level_range[0]) + "-"
             link = "%s#%s" % (item["link"], header_escsape(item["header"]))
             lOut.append("%s [%s](%s)" % (list_item, item["header"], link))
-    file(dest_name, "w").write("\n".join(lOut))
+    open(dest_name, "w").write("\n".join(lOut))
     
 def gen_file_local_toc(dest_name, level_range=[1,6]):
     lOut = []
@@ -237,7 +237,7 @@ def gen_file_local_toc(dest_name, level_range=[1,6]):
             list_item = "    " * (item["level"] - level_range[0]) + "-"
             link = "#%s" % (item["header"].replace(" ", "-").replace("\\", ""))
             lOut.append("%s [%s](%s)" % (list_item, item["header"].replace("\\", ""), link))
-    file(dest_name, "w").write("\n".join(lOut))
+    open(dest_name, "w").write("\n".join(lOut))
 
 ########################### German #########################
 mod = "techage"
diff --git a/manuals/toc_DE.md b/manuals/toc_DE.md
index 8ca24f5..8e26dda 100644
--- a/manuals/toc_DE.md
+++ b/manuals/toc_DE.md
@@ -44,10 +44,10 @@
         - [TA2 Flüssigkeitensammler / Liquid Sampler](./manual_ta2_DE.md#ta2-flüssigkeitensammler--liquid-sampler)
         - [TA2 Gesicherte Kiste / Protected Chest](./manual_ta2_DE.md#ta2-gesicherte-kiste--protected-chest)
         - [Techage Forceload Block](./manual_ta2_DE.md#techage-forceload-block)
-- [TA3: Ölzeitalter](./manual_ta3_DE.md#ta3:-Ölzeitalter)
-    - [Kohlekraftwerk / Ölkraftwerk](./manual_ta3_DE.md#kohlekraftwerk--Ölkraftwerk)
+- [TA3: Ölzeitalter](./manual_ta3_DE.md#ta3:-ölzeitalter)
+    - [Kohlekraftwerk / Ölkraftwerk](./manual_ta3_DE.md#kohlekraftwerk--ölkraftwerk)
         - [TA3 Kraftwerks-Feuerbox / Power Station Firebox](./manual_ta3_DE.md#ta3-kraftwerks-feuerbox--power-station-firebox)
-        - [TA3 Kraftwerks-Ölbrenner / TA3 Power Station Oil Burner](./manual_ta3_DE.md#ta3-kraftwerks-Ölbrenner--ta3-power-station-oil-burner)
+        - [TA3 Kraftwerks-Ölbrenner / TA3 Power Station Oil Burner](./manual_ta3_DE.md#ta3-kraftwerks-ölbrenner--ta3-power-station-oil-burner)
         - [TA3 Boiler unten/oben](./manual_ta3_DE.md#ta3-boiler-untenoben)
         - [TA3 Turbine](./manual_ta3_DE.md#ta3-turbine)
         - [TA3 Generator](./manual_ta3_DE.md#ta3-generator)
@@ -66,7 +66,7 @@
         - [TA3 Akku Block /  Akku Box](./manual_ta3_DE.md#ta3-akku-block---akku-box)
         - [TA3 Strom Terminal / Power Terminal](./manual_ta3_DE.md#ta3-strom-terminal--power-terminal)
     - [TA3 Industrieofen](./manual_ta3_DE.md#ta3-industrieofen)
-        - [TA3 Ofen-Ölbrenner / Furnace Oil Burner](./manual_ta3_DE.md#ta3-ofen-Ölbrenner--furnace-oil-burner)
+        - [TA3 Ofen-Ölbrenner / Furnace Oil Burner](./manual_ta3_DE.md#ta3-ofen-ölbrenner--furnace-oil-burner)
         - [TA3 Ofenoberteil / Furnace Top](./manual_ta3_DE.md#ta3-ofenoberteil--furnace-top)
         - [TA3 Gebläse / Booster](./manual_ta3_DE.md#ta3-gebläse--booster)
     - [Flüssigkeiten](./manual_ta3_DE.md#flüssigkeiten)
@@ -76,18 +76,18 @@
         - [TA4 Röhre / Pipe](./manual_ta3_DE.md#ta4-röhre--pipe)
         - [TA3 Rohr/Wanddurchbruch / TA3 Pipe Wall Entry Blöcke](./manual_ta3_DE.md#ta3-rohrwanddurchbruch--ta3-pipe-wall-entry-blöcke)
         - [TA Ventil / TA Valve](./manual_ta3_DE.md#ta-ventil--ta-valve)
-    - [Öl-Förderung](./manual_ta3_DE.md#Öl-förderung)
-        - [TA3 Ölexplorer / Oil Explorer](./manual_ta3_DE.md#ta3-Ölexplorer--oil-explorer)
-        - [TA3 Ölbohrkiste / Oil Drill Box](./manual_ta3_DE.md#ta3-Ölbohrkiste--oil-drill-box)
-        - [TA3 Ölpumpe / Oil Pumpjack](./manual_ta3_DE.md#ta3-Ölpumpe--oil-pumpjack)
+    - [Öl-Förderung](./manual_ta3_DE.md#öl-förderung)
+        - [TA3 Ölexplorer / Oil Explorer](./manual_ta3_DE.md#ta3-ölexplorer--oil-explorer)
+        - [TA3 Ölbohrkiste / Oil Drill Box](./manual_ta3_DE.md#ta3-ölbohrkiste--oil-drill-box)
+        - [TA3 Ölpumpe / Oil Pumpjack](./manual_ta3_DE.md#ta3-ölpumpe--oil-pumpjack)
         - [TA3 Bohrgestänge / Drill Pipe](./manual_ta3_DE.md#ta3-bohrgestänge--drill-pipe)
-        - [Öltank / Oil Tank](./manual_ta3_DE.md#Öltank--oil-tank)
-    - [Öl-Transport](./manual_ta3_DE.md#Öl-transport)
-        - [Öl-Transport mit dem Tankwagen](./manual_ta3_DE.md#Öl-transport-mit-dem-tankwagen)
-        - [Öl-Transport mit Fässern über Minecarts](./manual_ta3_DE.md#Öl-transport-mit-fässern-über-minecarts)
+        - [Öltank / Oil Tank](./manual_ta3_DE.md#öltank--oil-tank)
+    - [Öl-Transport](./manual_ta3_DE.md#öl-transport)
+        - [Öl-Transport mit dem Tankwagen](./manual_ta3_DE.md#öl-transport-mit-dem-tankwagen)
+        - [Öl-Transport mit Fässern über Minecarts](./manual_ta3_DE.md#öl-transport-mit-fässern-über-minecarts)
         - [Tankwagen / Tank Cart](./manual_ta3_DE.md#tankwagen--tank-cart)
         - [Kistenwagen / Chest Cart](./manual_ta3_DE.md#kistenwagen--chest-cart)
-    - [Öl-Verarbeitung](./manual_ta3_DE.md#Öl-verarbeitung)
+    - [Öl-Verarbeitung](./manual_ta3_DE.md#öl-verarbeitung)
         - [Destillationsturm / distiller tower](./manual_ta3_DE.md#destillationsturm--distiller-tower)
             - [Aufkocher / reboiler)](./manual_ta3_DE.md#aufkocher--reboiler))
     - [Logik-/Schalt-Blöcke](./manual_ta3_DE.md#logik-schalt-blöcke)
@@ -169,6 +169,10 @@
         - [TA4 LED Pflanzenlampe / TA4 LED Grow Light](./manual_ta4_DE.md#ta4-led-pflanzenlampe--ta4-led-grow-light)
         - [TA4 LED Straßenlampe / TA4 LED Street Lamp](./manual_ta4_DE.md#ta4-led-straßenlampe--ta4-led-street-lamp)
         - [TA4 LED Industrielampe / TA4 LED Industrial Lamp](./manual_ta4_DE.md#ta4-led-industrielampe--ta4-led-industrial-lamp)
+    - [TA4 Flüssigkeitsfilter](./manual_ta4_DE.md#ta4-flüssigkeitsfilter)
+        - [Fundament-Ebene](./manual_ta4_DE.md#fundament-ebene)
+        - [Schotter-Ebene](./manual_ta4_DE.md#schotter-ebene)
+        - [Einfüll-Ebene](./manual_ta4_DE.md#einfüll-ebene)
     - [Weitere TA4 Blöcke](./manual_ta4_DE.md#weitere-ta4-blöcke)
         - [TA4 Tank / TA4 Tank](./manual_ta4_DE.md#ta4-tank--ta4-tank)
         - [TA4 Pumpe / TA4 Pump](./manual_ta4_DE.md#ta4-pumpe--ta4-pump)
diff --git a/manuals/toc_EN.md b/manuals/toc_EN.md
index 1c997e3..f5d2dda 100644
--- a/manuals/toc_EN.md
+++ b/manuals/toc_EN.md
@@ -169,6 +169,10 @@
         - [TA4 LED Grow Light](./manual_ta4_EN.md#ta4-led-grow-light)
         - [TA4 Street Lamp](./manual_ta4_EN.md#ta4-street-lamp)
         - [TA4 LED Industrial Lamp](./manual_ta4_EN.md#ta4-led-industrial-lamp)
+    - [TA4 Liquid Filter](./manual_ta4_EN.md#ta4-liquid-filter)
+        - [Base Layer](./manual_ta4_EN.md#base-layer)
+        - [Gravel Layer](./manual_ta4_EN.md#gravel-layer)
+        - [Filling Layer](./manual_ta4_EN.md#filling-layer)
     - [More TA4 Blocks](./manual_ta4_EN.md#more-ta4-blocks)
         - [TA4 Tank](./manual_ta4_EN.md#ta4-tank)
         - [TA4 Pump](./manual_ta4_EN.md#ta4-pump)
diff --git a/textures/techage_gaspipe_hole.png b/textures/techage_gaspipe_hole.png
new file mode 100644
index 0000000..d5f3ef5
Binary files /dev/null and b/textures/techage_gaspipe_hole.png differ
diff --git a/textures/techage_liquid_filter_filler.png b/textures/techage_liquid_filter_filler.png
new file mode 100644
index 0000000..1b8fbbe
Binary files /dev/null and b/textures/techage_liquid_filter_filler.png differ
diff --git a/textures/techage_liquid_filter_filler_bottom.png b/textures/techage_liquid_filter_filler_bottom.png
new file mode 100644
index 0000000..0444647
Binary files /dev/null and b/textures/techage_liquid_filter_filler_bottom.png differ
diff --git a/textures/techage_ta4_filter.png b/textures/techage_ta4_filter.png
new file mode 100644
index 0000000..6099628
Binary files /dev/null and b/textures/techage_ta4_filter.png differ