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1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x .K6150PNTF, KoolerMax K6150P RO System Shell without tank faucet
1 x *Discontinued* RO6ALK
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR104H
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x KT-103, Optional Manual Membrane Flush Valve
1 x bulksf05, Koolermax Sediment Filter
1 x *Discontinued* RO585
1 x *Discontinued* RO585A
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x bulk818, DI resin refill bags Di-Ionization media
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x bulk201, Sediment Filter
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 201, 1st stage sediment 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 RO260
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x *Discontinued* RO585NTF
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x bulkc10, Koolermax Carbon Block Filter
1 x bulk213, Inline Carbon Filter
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x .K6A KoolerMax 75GPD 6STAGE Alkaline pH REVERSE OSMOSIS RO FILTE
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x bulkic21, Koolermax Inline Carbon Filter
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
2 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
2 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
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 AR150P
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x .K5150P, KoolerMax 150GPD 5 Stage RO System w/Booster Pump
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x *Discontinued* RD106
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
2 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
2 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x bulk205, Carbon Block Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x *Discontinued* RO585ERP
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x UU Clips Pair from Bracket to Membrane Filter
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x Bundle Filter KPAK-104m Sediment Carbon Block DI Resin Membrane
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350

View Cart$10,474.42
Specials Log InCreate Account Checkout  Shopping Cart93 item(s)
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x .K6150PNTF, KoolerMax K6150P RO System Shell without tank faucet
1 x *Discontinued* RO6ALK
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR104H
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x KT-103, Optional Manual Membrane Flush Valve
1 x bulksf05, Koolermax Sediment Filter
1 x *Discontinued* RO585
1 x *Discontinued* RO585A
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x bulk818, DI resin refill bags Di-Ionization media
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x bulk201, Sediment Filter
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 201, 1st stage sediment 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 RO260
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x *Discontinued* RO585NTF
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x bulkc10, Koolermax Carbon Block Filter
1 x bulk213, Inline Carbon Filter
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x .K6A KoolerMax 75GPD 6STAGE Alkaline pH REVERSE OSMOSIS RO FILTE
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x bulkic21, Koolermax Inline Carbon Filter
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
2 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
2 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
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 AR150P
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x .K5150P, KoolerMax 150GPD 5 Stage RO System w/Booster Pump
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x *Discontinued* RD106
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
2 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
2 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x bulk205, Carbon Block Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x *Discontinued* RO585ERP
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x UU Clips Pair from Bracket to Membrane Filter
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x Bundle Filter KPAK-104m Sediment Carbon Block DI Resin Membrane
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350

View Cart$10,474.42

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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