Log In Log In  |  Checkout   |  49 item(s)
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x 568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
2 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x *Discontinued* RO585ERP
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x *Discontinued* RO585NTF
1 x 706, Membrane Filter Casing Housing Assembly
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x UU Clips Pair Standard Filter to Standard Filter, 2" x 2"
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 718xl, Tubing 100 feet 1/4" white tube LLDPE PE for drinking wat
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x FRQ300, Flow Restrictor 300ML / min
1 x 578, TDS Water Quality Meter tds-3
1 x BBK10, Replacement Filter Big Blue Whole House WH-1134
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"

View Cart$1,856.99
Specials Log InCreate Account Checkout  Shopping Cart49 item(s)
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x 568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
2 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x *Discontinued* RO585ERP
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x *Discontinued* RO585NTF
1 x 706, Membrane Filter Casing Housing Assembly
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x UU Clips Pair Standard Filter to Standard Filter, 2" x 2"
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 718xl, Tubing 100 feet 1/4" white tube LLDPE PE for drinking wat
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x FRQ300, Flow Restrictor 300ML / min
1 x 578, TDS Water Quality Meter tds-3
1 x BBK10, Replacement Filter Big Blue Whole House WH-1134
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"

View Cart$1,856.99

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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