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1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x Bundle Filter Annual set KPAK-104b Sediment Carbon Resin Refill
1 x Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Filter,
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x IM60, Ice Maker or RV Water Filter, Inline Typle
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x CBV-38, Tank Ball Valve to 3/8 tubing
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better

View Cart$768.90
Specials Log InCreate Account Checkout  Shopping Cart34 item(s)
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x Bundle Filter Annual set KPAK-104b Sediment Carbon Resin Refill
1 x Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Filter,
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x IM60, Ice Maker or RV Water Filter, Inline Typle
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x CBV-38, Tank Ball Valve to 3/8 tubing
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better

View Cart$768.90

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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