Log In Log In  |  Checkout   |  103 item(s)
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
3 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x *Discontinued* RO155
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
2 x 706, Membrane Filter Casing Housing Assembly
1 x HK120 KoolerMax Aeroponics Hydroponics 150G RO Filtration System
3 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
3 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
2 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
1 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
2 x EMT-10, Empty Filter Cartridge Casing Housing
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x FRQ850, Flow Restrictor 850ML / min
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x 720, Feed Water Adapter with Needle Valve
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x FRQ420, Flow Restrictor 420ML / min
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x 718, Tubing 30 feet 1/4" white tube LLDPE PE for drinking water
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x 718xl, Tubing 100 feet 1/4" white tube LLDPE PE for drinking wat
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x FRQ200, Flow Restrictor 200ML / min
1 x 568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x FRQ550, Flow Restrictor 500 to 600ML / min
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x CP-KOR45, O RING FOR KOOLERMAX BOTTOM FILTER HOUSING CASING
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x FRQ300, Flow Restrictor 300ML / min
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x 723, Feed Water Adapter with Ball Valve
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 719, Drain Saddle Clamp / Valve
1 x 201, 1st stage sediment filter (replace every 6-12 months)

View Cart$3,109.48
Specials Log InCreate Account Checkout  Shopping Cart103 item(s)
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
3 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x *Discontinued* RO155
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
2 x 706, Membrane Filter Casing Housing Assembly
1 x HK120 KoolerMax Aeroponics Hydroponics 150G RO Filtration System
3 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
3 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
2 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
1 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
2 x EMT-10, Empty Filter Cartridge Casing Housing
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x FRQ850, Flow Restrictor 850ML / min
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x 720, Feed Water Adapter with Needle Valve
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x FRQ420, Flow Restrictor 420ML / min
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x 718, Tubing 30 feet 1/4" white tube LLDPE PE for drinking water
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x 718xl, Tubing 100 feet 1/4" white tube LLDPE PE for drinking wat
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x FRQ200, Flow Restrictor 200ML / min
1 x 568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x FRQ550, Flow Restrictor 500 to 600ML / min
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x CP-KOR45, O RING FOR KOOLERMAX BOTTOM FILTER HOUSING CASING
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x FRQ300, Flow Restrictor 300ML / min
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x 723, Feed Water Adapter with Ball Valve
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 719, Drain Saddle Clamp / Valve
1 x 201, 1st stage sediment filter (replace every 6-12 months)

View Cart$3,109.48

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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