Log In Log In  |  Checkout   |  39 item(s)
1 x 720, Feed Water Adapter with Needle Valve
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x MK420, Maintenance kit for RO565
2 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)

View Cart$824.65
Specials Log InCreate Account Checkout  Shopping Cart39 item(s)
1 x 720, Feed Water Adapter with Needle Valve
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x MK420, Maintenance kit for RO565
2 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)

View Cart$824.65

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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