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1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
2 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x 752, DC Booster Pump w/ Transformer
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 723, Feed Water Adapter with Ball Valve
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x EMT-10, Empty Filter Cartridge Casing Housing

View Cart$1,316.85
Specials Log InCreate Account Checkout  Shopping Cart34 item(s)
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
2 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x 752, DC Booster Pump w/ Transformer
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 723, Feed Water Adapter with Ball Valve
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x EMT-10, Empty Filter Cartridge Casing Housing

View Cart$1,316.85

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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