Log In Log In  |  Checkout   |  27 item(s)
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x 752, DC Booster Pump w/ Transformer
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 201, 1st stage sediment filter (replace every 6-12 months)

View Cart$612.39
Specials Log InCreate Account Checkout  Shopping Cart27 item(s)
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x 752, DC Booster Pump w/ Transformer
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 201, 1st stage sediment filter (replace every 6-12 months)

View Cart$612.39

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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