Log In Log In  |  Checkout   |  63 item(s)
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
3 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
2 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x FRQ300, Flow Restrictor 300ML / min
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
2 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x DI210, Heavy-duty DI system for Aquarium and Reef
1 x KT-103, Optional Manual Membrane Flush Valve
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
1 x 365, 4th stage TFC 50/65 US membrane filter (replace 2-3 yrs)
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x *Discontinued* RO585A
1 x TMR-220V-1A Aquatec TACS234-19 Transformer Power Supply EuroPlug
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x 752, DC Booster Pump w/ Transformer
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
1 x TMR-AQT-2A, Transformer Power Supply Aquatec TACS114-48 for 8800
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x 706, Membrane Filter Casing Housing Assembly
1 x TMR-AQT-68, Transformer Power Supply Aquatec TACS114-19EP for 68
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)

View Cart$3,251.93
Specials Log InCreate Account Checkout  Shopping Cart63 item(s)
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
3 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
2 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x FRQ300, Flow Restrictor 300ML / min
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
2 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x DI210, Heavy-duty DI system for Aquarium and Reef
1 x KT-103, Optional Manual Membrane Flush Valve
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
1 x 365, 4th stage TFC 50/65 US membrane filter (replace 2-3 yrs)
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x *Discontinued* RO585A
1 x TMR-220V-1A Aquatec TACS234-19 Transformer Power Supply EuroPlug
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x 752, DC Booster Pump w/ Transformer
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
1 x TMR-AQT-2A, Transformer Power Supply Aquatec TACS114-48 for 8800
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x 706, Membrane Filter Casing Housing Assembly
1 x TMR-AQT-68, Transformer Power Supply Aquatec TACS114-19EP for 68
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)

View Cart$3,251.93

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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