Log In Log In  |  Checkout   |  105 item(s)
2 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x .K5150P, KoolerMax 150GPD 5 Stage RO System w/Booster Pump
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x FM214G, FM-6710M DigiFlow Digital Water Flow Meter Gauge Moniter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x FM214G 1/4" NPT Digital Flow Meter count up total Water Gallons
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
2 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
2 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
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 Micro 1/4 NPT Digital Flow Meter count up total Water Liter LPM
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x AQF-600-105, Flow Meter Panel Mount 1/2" MPT
2 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x KF750, Elite Series: Polish Chrome Drinking Water Faucet
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
2 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
2 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x Panel 3/4" 6710M-66TM Digital Flow Meter count up GPM 115V
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 752, DC Booster Pump w/ Transformer
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
2 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x KF355, Antique Brushed Brass / Iron Finish Drinking Water Faucet
1 x 723, Feed Water Adapter with Ball Valve
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x 205, 5th stage final carbon filter
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x .SW-1C COUNTERTOP WATER FILTER SYSTEM (CLEAR HOUSING)
1 x FRQ550, Flow Restrictor 500 to 600ML / min
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x BBK10, Replacement Filter Big Blue Whole House WH-1134
2 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
2 x DB40, DI Resin Refill Bag for DI210, RD322
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
1 x KF310, Elite Series: Polish Chrome Drinking Water Faucet
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x FRQ420, Flow Restrictor 420ML / min
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x *Discontinued* RO585ERP
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
2 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x *Discontinued* RO585A
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x FM-6710M-88 1" Digital Flow Meter count up Total GPM 56" cable
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x FM-8100TG44, DigiFlow Digital Water Flow Rate Meter
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE

View Cart$6,048.77
Specials Log InCreate Account Checkout  Shopping Cart105 item(s)
2 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x .K5150P, KoolerMax 150GPD 5 Stage RO System w/Booster Pump
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x FM214G, FM-6710M DigiFlow Digital Water Flow Meter Gauge Moniter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x FM214G 1/4" NPT Digital Flow Meter count up total Water Gallons
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
2 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
2 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
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 Micro 1/4 NPT Digital Flow Meter count up total Water Liter LPM
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x AQF-600-105, Flow Meter Panel Mount 1/2" MPT
2 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x KF750, Elite Series: Polish Chrome Drinking Water Faucet
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
2 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
2 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x Panel 3/4" 6710M-66TM Digital Flow Meter count up GPM 115V
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 752, DC Booster Pump w/ Transformer
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
2 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x KF355, Antique Brushed Brass / Iron Finish Drinking Water Faucet
1 x 723, Feed Water Adapter with Ball Valve
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x 205, 5th stage final carbon filter
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x .SW-1C COUNTERTOP WATER FILTER SYSTEM (CLEAR HOUSING)
1 x FRQ550, Flow Restrictor 500 to 600ML / min
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x BBK10, Replacement Filter Big Blue Whole House WH-1134
2 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
2 x DB40, DI Resin Refill Bag for DI210, RD322
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
1 x KF310, Elite Series: Polish Chrome Drinking Water Faucet
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x FRQ420, Flow Restrictor 420ML / min
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x *Discontinued* RO585ERP
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
2 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x *Discontinued* RO585A
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x FM-6710M-88 1" Digital Flow Meter count up Total GPM 56" cable
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x FM-8100TG44, DigiFlow Digital Water Flow Rate Meter
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE

View Cart$6,048.77

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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