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3 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
3 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
3 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
2 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x KF310, Elite Series: Polish Chrome Drinking Water Faucet
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x Liter Digiflow 1/4NPT Digital Flow Meter count up total Water
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
2 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 3rd stage Special High Efficiency Membrane Filter HTFC-150
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x FM214G, FM-6710M DigiFlow Digital Water Flow Meter Gauge Moniter
1 x .RD322 Aquarium 260-300 GPD REVERSE OSMOSIS RO+DI WATER SYSTEM
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x AQF-600-105, Flow Meter Panel Mount 1/2" MPT
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x FM214G 1/4" NPT Digital Flow Meter count up total Water Gallons
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x .AR150PNTF, KoolerMax AR150P RO System Shell without tank faucet
1 x PH80, Digital pH Meter Hydrotester Calibration Storage Solutions
3 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
2 x 578, TDS Water Quality Meter tds-3
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
4 x 201, 1st stage sediment filter (replace every 6-12 months)
2 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x 4th Stage Color Changing DI Filter SC207 for AR-104H
4 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x *Discontinued* RD102
3 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 3/4" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x *Discontinued* RD106
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x WT-bac, Water Testing Kit, Bacteria Test
1 x FM-6710M-88 1" Digital Flow Meter count up Total GPM 56" cable
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
3 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x Panel 1/2" 6710M-44TM Digital Flow Meter count up Gallon 115V
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x *Discontinued* RO585
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
2 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x BBK10, Replacement Filter Big Blue Whole House WH-1134
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x UU Clips Pair Membrane to Filter, 2.5" to 2"
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 310, 2nd stage CTA 10 US Membrane filter
1 x KT-103, Optional Manual Membrane Flush Valve
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 706, Membrane Filter Casing Housing Assembly
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"

View Cart$5,939.93
Specials Log InCreate Account Checkout  Shopping Cart124 item(s)
3 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
3 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
3 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
2 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x KF310, Elite Series: Polish Chrome Drinking Water Faucet
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x Liter Digiflow 1/4NPT Digital Flow Meter count up total Water
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
2 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 3rd stage Special High Efficiency Membrane Filter HTFC-150
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x FM214G, FM-6710M DigiFlow Digital Water Flow Meter Gauge Moniter
1 x .RD322 Aquarium 260-300 GPD REVERSE OSMOSIS RO+DI WATER SYSTEM
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x AQF-600-105, Flow Meter Panel Mount 1/2" MPT
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x FM214G 1/4" NPT Digital Flow Meter count up total Water Gallons
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x .AR150PNTF, KoolerMax AR150P RO System Shell without tank faucet
1 x PH80, Digital pH Meter Hydrotester Calibration Storage Solutions
3 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
2 x 578, TDS Water Quality Meter tds-3
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
4 x 201, 1st stage sediment filter (replace every 6-12 months)
2 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x 4th Stage Color Changing DI Filter SC207 for AR-104H
4 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x *Discontinued* RD102
3 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 3/4" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x *Discontinued* RD106
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x WT-bac, Water Testing Kit, Bacteria Test
1 x FM-6710M-88 1" Digital Flow Meter count up Total GPM 56" cable
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
3 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x Panel 1/2" 6710M-44TM Digital Flow Meter count up Gallon 115V
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x *Discontinued* RO585
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
2 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x BBK10, Replacement Filter Big Blue Whole House WH-1134
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x UU Clips Pair Membrane to Filter, 2.5" to 2"
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 310, 2nd stage CTA 10 US Membrane filter
1 x KT-103, Optional Manual Membrane Flush Valve
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 706, Membrane Filter Casing Housing Assembly
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"

View Cart$5,939.93

ATU TEE Union Connector Quick Connect QC Fitting [ATU]

$3.50

ATU TEE Union Connector Quick Connect QC Fitting



* ATU TEE Union Connector, Quick Connect

* Please choose size from the selection box below. Both numbers are tubing OD Outside Diameter. First number is Tee double side and second number is the single side. (Pipe sizes can be confusing even for the experienced user. Pipe size is not the actual outside or inside diameter of the pipe but is the industry accepted designation. If you have any question please email us first.)
* 1/4" Tube OD x 1/4" Tube OD ATU0404
* 3/8" Tube OD x 1/4" Tube OD ATU0604
* 3/8" Tube OD x 3/8" Tube OD ATU0606
* 1/2" Tube OD x 3/8" Tube OD ATU0706
* 1/2" Tube OD x 1/2" Tube OD ATU0707


* Water & foods use: Products are manufactured from safe, non-toxic materials meeting the requirements of the US FDA, ERAS, ANSI/NSF-51,61, and SK Zert. Our products are widely used in water purification, food/beverage, and pneumatic systems.

* Function & Quality: Provides quick and convenient assembly-saving time & expense.

* Collet Design: Our unique oval collet design is superior and more practical, and is an improvement welcomed by our world wide customers in all industries.

* Additional Applications: Beyond water and food use, fittings can be used with air, gases, vacuum, & liquids. All connections can be assembled & disassembled repeatedly. A broad range of sizes covers a broad scope of applications.

* We carry different fittings in variation of sizes: 1/4", 3/8", or 1/2" adapters, connectors, fittings, or valves.  Most are not listed online, to avoid confusion to majority of RO system customers.  

* Send us a message with specification, intended application, and image of your setup or old fitting  to check if we have what you need. 

Available Options:

Size Combination:

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