Log In Log In  |  Checkout   |  41 item(s)
2 x 201, 1st stage sediment filter (replace every 6-12 months)
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x AQUATEC 8852-2J03-B424 High Flow Booster Pump 110V Transformer
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x *Discontinued* RD106
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x DDP5800, Aquatec Demand Delivery Pump 5851-7E12 Increase Output
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x TMR-25A, 2.5 AMP Transformer Power Supply Ballast for 8800 5853
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x 752, DC Booster Pump w/ Transformer
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x KT-103, Optional Manual Membrane Flush Valve
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)

View Cart$1,489.44
Specials Log InCreate Account Checkout  Shopping Cart41 item(s)
2 x 201, 1st stage sediment filter (replace every 6-12 months)
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x AQUATEC 8852-2J03-B424 High Flow Booster Pump 110V Transformer
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x *Discontinued* RD106
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x DDP5800, Aquatec Demand Delivery Pump 5851-7E12 Increase Output
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x TMR-25A, 2.5 AMP Transformer Power Supply Ballast for 8800 5853
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x 752, DC Booster Pump w/ Transformer
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x KT-103, Optional Manual Membrane Flush Valve
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)

View Cart$1,489.44

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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