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1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
2 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
2 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x .AR150PNTF, KoolerMax AR150P RO System Shell without tank faucet
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
2 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x HK120-P-TK for USA 110V / 60Hz
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x FM-8100TG44, DigiFlow Digital Water Flow Rate Meter
1 x ERP500 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G

View Cart$1,616.45
Specials Log InCreate Account Checkout  Shopping Cart28 item(s)
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
2 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
2 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x .AR150PNTF, KoolerMax AR150P RO System Shell without tank faucet
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
2 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x HK120-P-TK for USA 110V / 60Hz
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x FM-8100TG44, DigiFlow Digital Water Flow Rate Meter
1 x ERP500 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G

View Cart$1,616.45

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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