Log In Log In  |  Checkout   |  56 item(s)
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x TMR-DC-2412, Transformer Power Supply for #752 Booster Pump
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
1 x FM-8000T, DigiFlow Digital Water Flow Meter Rate Count Down
1 x CBV-38, Tank Ball Valve to 3/8 tubing
2 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x KF511, Polished Chrome Cross-Handle with Gold Trim Faucet
4 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x 565, Digital Pressure Gauge Tester Monitor
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x *Discontinued* RO6ALK
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x UU Clips Pair from Bracket to Membrane Filter
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR104H
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G

View Cart$2,249.88
Specials Log InCreate Account Checkout  Shopping Cart56 item(s)
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x TMR-DC-2412, Transformer Power Supply for #752 Booster Pump
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
1 x FM-8000T, DigiFlow Digital Water Flow Meter Rate Count Down
1 x CBV-38, Tank Ball Valve to 3/8 tubing
2 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x KF511, Polished Chrome Cross-Handle with Gold Trim Faucet
4 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x 565, Digital Pressure Gauge Tester Monitor
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x *Discontinued* RO6ALK
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x UU Clips Pair from Bracket to Membrane Filter
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR104H
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G

View Cart$2,249.88

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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