Log In Log In  |  Checkout   |  51 item(s)
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x 316, 2nd stage CTA 16 US Membrane filter
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
2 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
2 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
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 PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK

View Cart$2,562.43
Specials Log InCreate Account Checkout  Shopping Cart51 item(s)
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x 316, 2nd stage CTA 16 US Membrane filter
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
2 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
2 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
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 PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK

View Cart$2,562.43

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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