Log In Log In  |  Checkout   |  30 item(s)
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 706, Membrane Filter Casing Housing Assembly
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x 723, Feed Water Adapter with Ball Valve
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x 741-14, Diverter Valve for Countertop Water Units
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x 718, Tubing 30 feet 1/4" white tube LLDPE PE for drinking water
1 x Liter Digiflow 1/4NPT Digital Flow Meter count up total Water
1 x 578, TDS Water Quality Meter tds-3
1 x DM-1, Inline Dual TDS monitor (meter) for RO DI System DM1
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x FRQ420, Flow Restrictor 420ML / min
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x PH80, Digital pH Meter Hydrotester Calibration Storage Solutions
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G

View Cart$795.95
Specials Log InCreate Account Checkout  Shopping Cart30 item(s)
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 706, Membrane Filter Casing Housing Assembly
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x 723, Feed Water Adapter with Ball Valve
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x 741-14, Diverter Valve for Countertop Water Units
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x 718, Tubing 30 feet 1/4" white tube LLDPE PE for drinking water
1 x Liter Digiflow 1/4NPT Digital Flow Meter count up total Water
1 x 578, TDS Water Quality Meter tds-3
1 x DM-1, Inline Dual TDS monitor (meter) for RO DI System DM1
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x FRQ420, Flow Restrictor 420ML / min
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x PH80, Digital pH Meter Hydrotester Calibration Storage Solutions
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G

View Cart$795.95

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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