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2 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x 719, Drain Saddle Clamp / Valve
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x Bundle Filter KPAK-104m Sediment Carbon Block DI Resin Membrane
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 365, 4th stage TFC 50/65 US membrane filter (replace 2-3 yrs)
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR104H
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO

View Cart$1,274.75
Specials Log InCreate Account Checkout  Shopping Cart33 item(s)
2 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x 719, Drain Saddle Clamp / Valve
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x Bundle Filter KPAK-104m Sediment Carbon Block DI Resin Membrane
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 365, 4th stage TFC 50/65 US membrane filter (replace 2-3 yrs)
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR104H
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO

View Cart$1,274.75

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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