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4 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x CBV-38, Tank Ball Valve to 3/8 tubing
5 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x *Discontinued* RO585NTF
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
2 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 752, DC Booster Pump w/ Transformer
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
5 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x .SW-1C COUNTERTOP WATER FILTER SYSTEM (CLEAR HOUSING)
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
2 x 201, 1st stage sediment filter (replace every 6-12 months)
4 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
3 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
2 x KT-103, Optional Manual Membrane Flush Valve
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
4 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
5 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 5th Stage pn215 Refillable inline DI filter (color change)
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
3 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x .K5150P, KoolerMax 150GPD 5 Stage RO System w/Booster Pump
2 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
3 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x *Discontinued* RO585ERP
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x *Discontinued* RO585A
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
2 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x .K6150PNTF, KoolerMax K6150P RO System Shell without tank faucet
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x Special Filter Kit Koolermax dealer distribution kit
1 x Annual Filter Kit Koolermax Series KPAK-3 Sediment Carbon Block
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)

View Cart$6,891.83
Specials Log InCreate Account Checkout  Shopping Cart139 item(s)
4 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x CBV-38, Tank Ball Valve to 3/8 tubing
5 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x *Discontinued* RO585NTF
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
2 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 752, DC Booster Pump w/ Transformer
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
5 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x .SW-1C COUNTERTOP WATER FILTER SYSTEM (CLEAR HOUSING)
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
2 x 201, 1st stage sediment filter (replace every 6-12 months)
4 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
3 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
2 x KT-103, Optional Manual Membrane Flush Valve
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
4 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
5 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 5th Stage pn215 Refillable inline DI filter (color change)
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
3 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x .K5150P, KoolerMax 150GPD 5 Stage RO System w/Booster Pump
2 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
3 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x *Discontinued* RO585ERP
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x *Discontinued* RO585A
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
2 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x .K6150PNTF, KoolerMax K6150P RO System Shell without tank faucet
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x Special Filter Kit Koolermax dealer distribution kit
1 x Annual Filter Kit Koolermax Series KPAK-3 Sediment Carbon Block
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)

View Cart$6,891.83

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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