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2 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x .SW-1C COUNTERTOP WATER FILTER SYSTEM (CLEAR HOUSING)
1 x KT-103, Optional Manual Membrane Flush Valve
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x 719, Drain Saddle Clamp / Valve
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 723, Feed Water Adapter with Ball Valve
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
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 Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 741-14, Diverter Valve for Countertop Water Units
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO

View Cart$3,694.20
Specials Log InCreate Account Checkout  Shopping Cart69 item(s)
2 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x .SW-1C COUNTERTOP WATER FILTER SYSTEM (CLEAR HOUSING)
1 x KT-103, Optional Manual Membrane Flush Valve
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x 719, Drain Saddle Clamp / Valve
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 723, Feed Water Adapter with Ball Valve
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
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 Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 741-14, Diverter Valve for Countertop Water Units
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO

View Cart$3,694.20

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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