Log In Log In  |  Checkout   |  33 item(s)
1 x 671C, Replacement UV Lamp Light for 609C (16 Watt)
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
2 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x bulk201, Sediment Filter
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x TMR-UV-6W, Replacement UV Ballast Transformer 6 Watts for 602 UV
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 752, DC Booster Pump w/ Transformer
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch

View Cart$2,417.95
Specials Log InCreate Account Checkout  Shopping Cart33 item(s)
1 x 671C, Replacement UV Lamp Light for 609C (16 Watt)
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
2 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x bulk201, Sediment Filter
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x TMR-UV-6W, Replacement UV Ballast Transformer 6 Watts for 602 UV
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 752, DC Booster Pump w/ Transformer
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch

View Cart$2,417.95

AUC Union Connector OD Quick Connect QC Fitting [AUC]

$3.00

AUC Union Connector OD Quick Connect QC Fitting



* AUC, Union Connector, Quick Connect type

* Please choose size from the selection box below. Both numbers are tubing OD Outside Diameter (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 AUC0404
* 3/8" Tube OD x 1/4" Tube OD AUC0604
* 3/8" Tube OD x 3/8" Tube OD AUC0606
* 1/2" Tube OD x 3/8" Tube OD AUC0706
* 1/2" Tube OD x 1/2" Tube OD AUC0707


* 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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