Log In Log In  |  Checkout   |  64 item(s)
2 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x PH80, Digital pH Meter Hydrotester Calibration Storage Solutions
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
2 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 316UP, Upgrade for CTA20 gal/day (includes US Membrane filter)
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
2 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x 706, Membrane Filter Casing Housing Assembly
1 x AQF-600-105, Flow Meter Panel Mount 1/2" MPT
2 x EMT-10, Empty Filter Cartridge Casing Housing
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 565, Digital Pressure Gauge Tester Monitor
1 x 1/2" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x WS-150M, Whole House Water Softener

View Cart$4,903.93
Specials Log InCreate Account Checkout  Shopping Cart64 item(s)
2 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x PH80, Digital pH Meter Hydrotester Calibration Storage Solutions
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
2 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 316UP, Upgrade for CTA20 gal/day (includes US Membrane filter)
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
2 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x 706, Membrane Filter Casing Housing Assembly
1 x AQF-600-105, Flow Meter Panel Mount 1/2" MPT
2 x EMT-10, Empty Filter Cartridge Casing Housing
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 565, Digital Pressure Gauge Tester Monitor
1 x 1/2" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x WS-150M, Whole House Water Softener

View Cart$4,903.93

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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