Log In Log In  |  Checkout   |  25 item(s)
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x KT-103, Optional Manual Membrane Flush Valve
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x Special Filter Kit Koolermax dealer distribution kit
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x FM10, STEEL BRACKET SINGLE HOUSING MOUNTING SYSTEM
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x KF750, Elite Series: Polish Chrome Drinking Water Faucet

View Cart$1,533.00
Specials Log InCreate Account Checkout  Shopping Cart25 item(s)
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x KT-103, Optional Manual Membrane Flush Valve
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x Special Filter Kit Koolermax dealer distribution kit
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x FM10, STEEL BRACKET SINGLE HOUSING MOUNTING SYSTEM
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x KF750, Elite Series: Polish Chrome Drinking Water Faucet

View Cart$1,533.00

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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