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1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
2 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x N-14-1M, Nipple Fitting connector between standard RO housing
1 x .K5150P, KoolerMax 150GPD 5 Stage RO System w/Booster Pump
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x *Discontinued* RD106
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x *Discontinued* RO6ALK
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System

View Cart$2,571.95
Specials Log InCreate Account Checkout  Shopping Cart30 item(s)
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
2 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x N-14-1M, Nipple Fitting connector between standard RO housing
1 x .K5150P, KoolerMax 150GPD 5 Stage RO System w/Booster Pump
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x *Discontinued* RD106
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x *Discontinued* RO6ALK
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System

View Cart$2,571.95

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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