Log In Log In  |  Checkout   |  45 item(s)
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 718xl, Tubing 100 feet 1/4" white tube LLDPE PE for drinking wat
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x 214, Clear Inline Filter Cartridge Empty Case
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
2 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
1 x 201, 1st stage sediment filter (replace every 6-12 months)
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x 706, Membrane Filter Casing Housing Assembly
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All

View Cart$1,575.44
Specials Log InCreate Account Checkout  Shopping Cart45 item(s)
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 718xl, Tubing 100 feet 1/4" white tube LLDPE PE for drinking wat
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x 214, Clear Inline Filter Cartridge Empty Case
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
2 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
1 x 201, 1st stage sediment filter (replace every 6-12 months)
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x 706, Membrane Filter Casing Housing Assembly
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All

View Cart$1,575.44

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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