Log In Log In  |  Checkout   |  48 item(s)
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
2 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 723, Feed Water Adapter with Ball Valve
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 205, 3rd stage solid carbon block filter
4 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x 3rd stage Special High Efficiency Membrane Filter HTFC-150
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x 773, AC Booster Pump Assembly Large 150-200GPD RO systems SET
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x WS-150M, Whole House Water Softener
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x DI210, Heavy-duty DI system for Aquarium and Reef
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 741-14, Diverter Valve for Countertop Water Units
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x TMR-UV-6W, Replacement UV Ballast Transformer 6 Watts for 602 UV
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System

View Cart$5,006.37
Specials Log InCreate Account Checkout  Shopping Cart48 item(s)
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
2 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 723, Feed Water Adapter with Ball Valve
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 205, 3rd stage solid carbon block filter
4 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x 3rd stage Special High Efficiency Membrane Filter HTFC-150
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x 773, AC Booster Pump Assembly Large 150-200GPD RO systems SET
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x WS-150M, Whole House Water Softener
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x DI210, Heavy-duty DI system for Aquarium and Reef
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 741-14, Diverter Valve for Countertop Water Units
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x TMR-UV-6W, Replacement UV Ballast Transformer 6 Watts for 602 UV
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System

View Cart$5,006.37

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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