Log In Log In  |  Checkout   |  100 item(s)
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
2 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x AQF-600-105, Flow Meter Panel Mount 1/2" MPT
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x 1/2" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x 568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
1 x 316, 2nd stage CTA 16 US Membrane filter
2 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
2 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
2 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x *Discontinued* RO585NTF
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x Panel 1/4 Digital Flow Meter count up total Gallons GPM 56"cable
1 x 565, Digital Pressure Gauge Tester Monitor
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x FM214G 1/4" NPT Digital Flow Meter count up total Water Gallons
1 x PH80, Digital pH Meter Hydrotester Calibration Storage Solutions
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x *Discontinued* RD102
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x *Discontinued* RO585
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 718xl, Tubing 100 feet 1/4" white tube LLDPE PE for drinking wat
1 x Panel 1/2" 6710M-44TM Digital Flow Meter count up Gallon 115V
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x Special Filter Kit Koolermax dealer distribution kit
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
2 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x *Discontinued* RO6ALK
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x *Discontinued* RO585A
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x *Discontinued* RD106
1 x WSACF-150T, Whole House Water Treatment ACF-150T
2 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
2 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 706, Membrane Filter Casing Housing Assembly
1 x FM-8100TG44, DigiFlow Digital Water Flow Rate Meter
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x 719, Drain Saddle Clamp / Valve
1 x *Discontinued* RO585ERP
1 x .AR150PNTF, KoolerMax AR150P RO System Shell without tank faucet
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x Panel 3/4" 6710M-66TM Digital Flow Meter count up GPM 115V
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x FRQ850, Flow Restrictor 850ML / min
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x FRQ300, Flow Restrictor 300ML / min
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 741-38, Diverter Valve for RO DI Water Systems

View Cart$7,932.44
Specials Log InCreate Account Checkout  Shopping Cart100 item(s)
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
2 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x AQF-600-105, Flow Meter Panel Mount 1/2" MPT
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x 1/2" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x 568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
1 x 316, 2nd stage CTA 16 US Membrane filter
2 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
2 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
2 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x *Discontinued* RO585NTF
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x Panel 1/4 Digital Flow Meter count up total Gallons GPM 56"cable
1 x 565, Digital Pressure Gauge Tester Monitor
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x FM214G 1/4" NPT Digital Flow Meter count up total Water Gallons
1 x PH80, Digital pH Meter Hydrotester Calibration Storage Solutions
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x *Discontinued* RD102
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x *Discontinued* RO585
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 718xl, Tubing 100 feet 1/4" white tube LLDPE PE for drinking wat
1 x Panel 1/2" 6710M-44TM Digital Flow Meter count up Gallon 115V
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x Special Filter Kit Koolermax dealer distribution kit
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
2 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x *Discontinued* RO6ALK
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x *Discontinued* RO585A
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x *Discontinued* RD106
1 x WSACF-150T, Whole House Water Treatment ACF-150T
2 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
2 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 706, Membrane Filter Casing Housing Assembly
1 x FM-8100TG44, DigiFlow Digital Water Flow Rate Meter
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x 719, Drain Saddle Clamp / Valve
1 x *Discontinued* RO585ERP
1 x .AR150PNTF, KoolerMax AR150P RO System Shell without tank faucet
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x Panel 3/4" 6710M-66TM Digital Flow Meter count up GPM 115V
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x FRQ850, Flow Restrictor 850ML / min
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x FRQ300, Flow Restrictor 300ML / min
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 741-38, Diverter Valve for RO DI Water Systems

View Cart$7,932.44

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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