Log In Log In  |  Checkout   |  165 item(s)
2 x SC209, Specialty Filter Nitrate Removal Filter
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x IM60, Ice Maker or RV Water Filter, Inline Typle
2 x 201, 1st stage sediment filter (replace every 6-12 months)
3 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
2 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x *Discontinued* RO585NTF
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x *Discontinued* RD150
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
2 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x TMR-220V-1A Aquatec TACS234-19 Transformer Power Supply EuroPlug
7 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x TMR-25A, 2.5 AMP Transformer Power Supply Ballast for 8800 5853
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
2 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
4 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
2 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
2 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
5 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
2 x KT-103, Optional Manual Membrane Flush Valve
2 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
4 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
4 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
2 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
4 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
2 x 723, Feed Water Adapter with Ball Valve
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x HK120-PUMP KoolerMax Aeroponics Hydroponics System Booster Pump
1 x .AR150PNTF, KoolerMax AR150P RO System Shell without tank faucet
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x *Discontinued* RO585A
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
2 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
2 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
2 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
2 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
2 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x 335, 3rd stage TFC 35/45 US membrane filter (every 2-3 yrs)
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 752, DC Booster Pump w/ Transformer
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x *Discontinued* RO6ALK
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x DDP5800, Aquatec Demand Delivery Pump 5851-7E12 Increase Output
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x *Discontinued* RO585ERP
1 x Special Filter Kit Koolermax dealer distribution kit
2 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 756SET, Aquatec Permeate Pump Reverse Osmosis System ERP1000
1 x 719, Drain Saddle Clamp / Valve
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
View Cart$7,027.44
Home
Specials Log InCreate Account Checkout  Shopping Cart165 item(s)
2 x SC209, Specialty Filter Nitrate Removal Filter
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x IM60, Ice Maker or RV Water Filter, Inline Typle
2 x 201, 1st stage sediment filter (replace every 6-12 months)
3 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
2 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x *Discontinued* RO585NTF
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x *Discontinued* RD150
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
2 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x TMR-220V-1A Aquatec TACS234-19 Transformer Power Supply EuroPlug
7 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x TMR-25A, 2.5 AMP Transformer Power Supply Ballast for 8800 5853
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
2 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
4 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
2 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
2 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
5 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
2 x KT-103, Optional Manual Membrane Flush Valve
2 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
4 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
4 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
2 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
4 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
2 x 723, Feed Water Adapter with Ball Valve
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x HK120-PUMP KoolerMax Aeroponics Hydroponics System Booster Pump
1 x .AR150PNTF, KoolerMax AR150P RO System Shell without tank faucet
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x *Discontinued* RO585A
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
2 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
2 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
2 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
2 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
2 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x 335, 3rd stage TFC 35/45 US membrane filter (every 2-3 yrs)
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 752, DC Booster Pump w/ Transformer
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x *Discontinued* RO6ALK
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x DDP5800, Aquatec Demand Delivery Pump 5851-7E12 Increase Output
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x *Discontinued* RO585ERP
1 x Special Filter Kit Koolermax dealer distribution kit
2 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 756SET, Aquatec Permeate Pump Reverse Osmosis System ERP1000
1 x 719, Drain Saddle Clamp / Valve
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
View Cart$7,027.44

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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