Log In Log In  |  Checkout   |  43 item(s)
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x FRQ420, Flow Restrictor 420ML / min
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
1 x 752, DC Booster Pump w/ Transformer
2 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x SET8855-300 Aquatec 5853 Booster Pump Assembly for 300GPD RO Sys
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x DDP5800, Aquatec Demand Delivery Pump 5851-7E12 Increase Output
1 x 335, 3rd stage TFC 35/45 US membrane filter (every 2-3 yrs)
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x CP-KOR45, O RING FOR KOOLERMAX BOTTOM FILTER HOUSING CASING
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x bulkc10, Koolermax Carbon Block Filter
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x WH-250, Whole House Water Treatment Sediment Carbon Filter Syste
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 773, AC Booster Pump Assembly Large 150-200GPD RO systems SET
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House

View Cart$2,197.65
Specials Log InCreate Account Checkout  Shopping Cart43 item(s)
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x FRQ420, Flow Restrictor 420ML / min
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
1 x 752, DC Booster Pump w/ Transformer
2 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x SET8855-300 Aquatec 5853 Booster Pump Assembly for 300GPD RO Sys
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x DDP5800, Aquatec Demand Delivery Pump 5851-7E12 Increase Output
1 x 335, 3rd stage TFC 35/45 US membrane filter (every 2-3 yrs)
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x CP-KOR45, O RING FOR KOOLERMAX BOTTOM FILTER HOUSING CASING
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x bulkc10, Koolermax Carbon Block Filter
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x WH-250, Whole House Water Treatment Sediment Carbon Filter Syste
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 773, AC Booster Pump Assembly Large 150-200GPD RO systems SET
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House

View Cart$2,197.65

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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