Log In Log In  |  Checkout   |  156 item(s)
1 x 718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
2 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
2 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
2 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Dispense
2 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x FRQ200, Flow Restrictor 200ML / min
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
2 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x 723, Feed Water Adapter with Ball Valve
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
2 x Conversion Kit, Convert Aquarium to Drinking RO Water System
2 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x KF310, Elite Series: Polish Chrome Drinking Water Faucet
1 x SC209, Specialty Filter Nitrate Removal Filter
2 x 201, 1st stage sediment filter (replace every 6-12 months)
4 x Parts, Ro Water System Installation Parts Bag 1/4"
2 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
1 x HK120 KoolerMax Aeroponics Hydroponics 150G RO Filtration System
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
2 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
2 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x KF750, Elite Series: Polish Chrome Drinking Water Faucet
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 326, 3rd stage TFC 24 /26 US membrane filter (replace 2-3 yrs)
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
2 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x *Discontinued* RO585
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x .K5150P, KoolerMax 150GPD 5 Stage RO System w/Booster Pump
1 x *Discontinued* RO155C
1 x 3/4" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x Panel 3/4" 6710M-66TM Digital Flow Meter count up GPM 115V
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
2 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x FM-8000T, DigiFlow Digital Water Flow Meter Rate Count Down
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
2 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x FM214G, FM-6710M DigiFlow Digital Water Flow Meter Gauge Moniter
2 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x KF612, Elite Series: Oil Rubbed Bronze ORB Drinking Water Faucet
1 x 335, 3rd stage TFC 35/45 US membrane filter (every 2-3 yrs)
2 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x *Discontinued* RO585ERP
1 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x N-14-1M, Nipple Fitting connector between standard RO housing
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x Liter Digiflow 1/4NPT Digital Flow Meter count up total Water
2 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x 578, TDS Water Quality Meter tds-3
1 x Special Filter Kit Koolermax dealer distribution kit
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x FRQ850, Flow Restrictor 850ML / min
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x 752, DC Booster Pump w/ Transformer
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
2 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 718, Tubing 30 feet 1/4" white tube LLDPE PE for drinking water
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x FM-8100TG44, DigiFlow Digital Water Flow Rate Meter
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
1 x *Discontinued* RO585A
1 x Panel 1/2" 6710M-44TM Digital Flow Meter count up Gallon 115V
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x *Discontinued* RO155
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
1 x Bundle Filter KPAK-104m Sediment Carbon Block DI Resin Membrane
1 x WS-150M, Whole House Water Softener
1 x 565, Digital Pressure Gauge Tester Monitor
1 x 205, 2nd stage carbon block filter (replace every 12 months)
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x HK120-P-TK for USA 110V / 60Hz
1 x KF511, Polished Chrome Cross-Handle with Gold Trim Faucet
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x 1/2" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x Bundle Filter KPAK-104bm Sediment Carbon DI Resin Membrane
1 x FRQ300, Flow Restrictor 300ML / min
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x FM214G 1/4" NPT Digital Flow Meter count up total Water Gallons

View Cart$10,279.80
Specials Log InCreate Account Checkout  Shopping Cart156 item(s)
1 x 718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
2 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
2 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
2 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Dispense
2 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x FRQ200, Flow Restrictor 200ML / min
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
2 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x 723, Feed Water Adapter with Ball Valve
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
2 x Conversion Kit, Convert Aquarium to Drinking RO Water System
2 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x KF310, Elite Series: Polish Chrome Drinking Water Faucet
1 x SC209, Specialty Filter Nitrate Removal Filter
2 x 201, 1st stage sediment filter (replace every 6-12 months)
4 x Parts, Ro Water System Installation Parts Bag 1/4"
2 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
1 x HK120 KoolerMax Aeroponics Hydroponics 150G RO Filtration System
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
2 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
2 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x KF750, Elite Series: Polish Chrome Drinking Water Faucet
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 326, 3rd stage TFC 24 /26 US membrane filter (replace 2-3 yrs)
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
2 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x *Discontinued* RO585
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x .K5150P, KoolerMax 150GPD 5 Stage RO System w/Booster Pump
1 x *Discontinued* RO155C
1 x 3/4" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x Panel 3/4" 6710M-66TM Digital Flow Meter count up GPM 115V
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
2 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x FM-8000T, DigiFlow Digital Water Flow Meter Rate Count Down
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
2 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x FM214G, FM-6710M DigiFlow Digital Water Flow Meter Gauge Moniter
2 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x KF612, Elite Series: Oil Rubbed Bronze ORB Drinking Water Faucet
1 x 335, 3rd stage TFC 35/45 US membrane filter (every 2-3 yrs)
2 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x *Discontinued* RO585ERP
1 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x N-14-1M, Nipple Fitting connector between standard RO housing
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x Liter Digiflow 1/4NPT Digital Flow Meter count up total Water
2 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x 578, TDS Water Quality Meter tds-3
1 x Special Filter Kit Koolermax dealer distribution kit
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x FRQ850, Flow Restrictor 850ML / min
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x 752, DC Booster Pump w/ Transformer
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
2 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 718, Tubing 30 feet 1/4" white tube LLDPE PE for drinking water
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x FM-8100TG44, DigiFlow Digital Water Flow Rate Meter
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
1 x *Discontinued* RO585A
1 x Panel 1/2" 6710M-44TM Digital Flow Meter count up Gallon 115V
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x *Discontinued* RO155
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
1 x Bundle Filter KPAK-104m Sediment Carbon Block DI Resin Membrane
1 x WS-150M, Whole House Water Softener
1 x 565, Digital Pressure Gauge Tester Monitor
1 x 205, 2nd stage carbon block filter (replace every 12 months)
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x HK120-P-TK for USA 110V / 60Hz
1 x KF511, Polished Chrome Cross-Handle with Gold Trim Faucet
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x 1/2" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x Bundle Filter KPAK-104bm Sediment Carbon DI Resin Membrane
1 x FRQ300, Flow Restrictor 300ML / min
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x FM214G 1/4" NPT Digital Flow Meter count up total Water Gallons

View Cart$10,279.80

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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