Log In Log In  |  Checkout   |  35 item(s)
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x bulkc10, Koolermax Carbon Block Filter
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x UU Clips Pair Standard Filter to Standard Filter, 2" x 2"
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x KF750, Elite Series: Polish Chrome Drinking Water Faucet
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
2 x DB40, DI Resin Refill Bag for DI210, RD322
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
2 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x bulk213, Inline Carbon Filter
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x 316UP, Upgrade for CTA20 gal/day (includes US Membrane filter)
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 310, 2nd stage CTA 10 US Membrane filter (every 2-3 yrs)
1 x UU Clips Pair Membrane to Filter, 2.5" to 2"
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x DM-1, Inline Dual TDS monitor (meter) for RO DI System DM1
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT

View Cart$1,348.20
Specials Log InCreate Account Checkout  Shopping Cart35 item(s)
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x bulkc10, Koolermax Carbon Block Filter
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x UU Clips Pair Standard Filter to Standard Filter, 2" x 2"
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x KF750, Elite Series: Polish Chrome Drinking Water Faucet
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
2 x DB40, DI Resin Refill Bag for DI210, RD322
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
2 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x bulk213, Inline Carbon Filter
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x 316UP, Upgrade for CTA20 gal/day (includes US Membrane filter)
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 310, 2nd stage CTA 10 US Membrane filter (every 2-3 yrs)
1 x UU Clips Pair Membrane to Filter, 2.5" to 2"
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x DM-1, Inline Dual TDS monitor (meter) for RO DI System DM1
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT

View Cart$1,348.20

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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