Log In Log In  |  Checkout   |  30 item(s)
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 205, 5th stage final carbon filter
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
2 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x KT-103, Optional Manual Membrane Flush Valve
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter

View Cart$767.19
Specials Log InCreate Account Checkout  Shopping Cart30 item(s)
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 205, 5th stage final carbon filter
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
2 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x KT-103, Optional Manual Membrane Flush Valve
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter

View Cart$767.19

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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