Log In Log In  |  Checkout   |  111 item(s)
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
2 x bulk213, Inline Carbon Filter
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
2 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
5 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
2 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x bulkc10, Koolermax Carbon Block Filter
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 773, AC Booster Pump Assembly Large 150-200GPD RO systems SET
3 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
3 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x 723, Feed Water Adapter with Ball Valve
1 x .K5150P, KoolerMax 150GPD 5 Stage RO System w/Booster Pump
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x 205, 2nd stage carbon block filter (replace every 12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR104H
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x KF750, Elite Series: Polish Chrome Drinking Water Faucet
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x bulk205, Carbon Block Filter
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x SET8855-300 Aquatec 5853 Booster Pump Assembly for 300GPD RO Sys
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x PE Tubing Tube Cutter
1 x FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x *Discontinued* RO155C
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO

View Cart$6,925.43
Specials Log InCreate Account Checkout  Shopping Cart111 item(s)
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
2 x bulk213, Inline Carbon Filter
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
2 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
5 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
2 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x bulkc10, Koolermax Carbon Block Filter
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 773, AC Booster Pump Assembly Large 150-200GPD RO systems SET
3 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
3 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x 723, Feed Water Adapter with Ball Valve
1 x .K5150P, KoolerMax 150GPD 5 Stage RO System w/Booster Pump
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x 205, 2nd stage carbon block filter (replace every 12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR104H
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x KF750, Elite Series: Polish Chrome Drinking Water Faucet
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x bulk205, Carbon Block Filter
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x SET8855-300 Aquatec 5853 Booster Pump Assembly for 300GPD RO Sys
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x PE Tubing Tube Cutter
1 x FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x *Discontinued* RO155C
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO

View Cart$6,925.43

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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