Log In Log In  |  Checkout   |  28 item(s)
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
2 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x BBK10, Replacement Filter Big Blue Whole House WH-1134
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 316, 2nd stage CTA 16 US Membrane filter
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x 719, Drain Saddle Clamp / Valve
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x KF320, Elite Series: Brushed Nickel / Stainless Steel Faucet
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x HK120 KoolerMax Aeroponics Hydroponics 150G RO Filtration System
1 x FM214G, FM-6710M DigiFlow Digital Water Flow Meter Gauge Moniter
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x SC209, Specialty Filter Nitrate Removal Filter

View Cart$923.25
Specials Log InCreate Account Checkout  Shopping Cart28 item(s)
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
2 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x BBK10, Replacement Filter Big Blue Whole House WH-1134
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 316, 2nd stage CTA 16 US Membrane filter
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x 719, Drain Saddle Clamp / Valve
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x KF320, Elite Series: Brushed Nickel / Stainless Steel Faucet
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x HK120 KoolerMax Aeroponics Hydroponics 150G RO Filtration System
1 x FM214G, FM-6710M DigiFlow Digital Water Flow Meter Gauge Moniter
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x SC209, Specialty Filter Nitrate Removal Filter

View Cart$923.25

ABU, Bulkhead Union Connector [ABU]

$4.50

ABU, Bulkhead Union Connector



* ABU, Bulkhead Union Connector

* Please choose size from the selection box below. First number is tubing OD Outside Diameter and second number is NPT National Pipe Thread. (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" NPTF Thread ABU0404
* 1/4" Tube OD x 3/8" NPTF Thread ABU0406
* 3/8" Tube OD x 1/4" NPTF Thread ABU0604
* 3/8" Tube OD x 3/8" NPTF Thread ABU0606
* 1/2" Tube OD x 1/2" NPTF Thread ABU0707


* 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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