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1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
2 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 741-14, Diverter Valve for Countertop Water Units
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
3 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x HK120-P-TK for USA 110V / 60Hz
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x N-14-1M, Nipple Fitting connector between standard RO housing
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
2 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
2 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x 565, Digital Pressure Gauge Tester Monitor
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT

View Cart$4,111.80
Specials Log InCreate Account Checkout  Shopping Cart50 item(s)
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
2 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 741-14, Diverter Valve for Countertop Water Units
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
3 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x HK120-P-TK for USA 110V / 60Hz
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x N-14-1M, Nipple Fitting connector between standard RO housing
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
2 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
2 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x 565, Digital Pressure Gauge Tester Monitor
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT

View Cart$4,111.80

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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