Log In Log In  |  Checkout   |  98 item(s)
2 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
2 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x UU Clips Pair Membrane to Filter, 2.5" to 2"
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
3 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x *Discontinued* RD106
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x 6th Stage pn215 Refillable inline DI filter (color change)
3 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x 752, DC Booster Pump w/ Transformer
6 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
3 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x .AR122 KoolerMax 6STAGE Aquarium Reef REVERSE OSMOSIS RODI WATER
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
2 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 4th stage Optional Refill bag #818 DI Resin Refill Bag
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
2 x 214, Clear Inline Filter Cartridge Empty Case
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Filter,
2 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
2 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x bulk205, Carbon Block Filter
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x IM60, Ice Maker or RV Water Filter, Inline Typle
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x Bundle Filter Annual set KPAK-104b Sediment Carbon Resin Refill
1 x FRQ850, Flow Restrictor 850ML / min
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x ERP500 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x *Discontinued* RO155
1 x KT-103, Optional Manual Membrane Flush Valve
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x WT-bac, Water Testing Kit, Bacteria Test
1 x 277, SED1005BB Big Blue 5 micron sediment filter 10"
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322

View Cart$6,341.84
Specials Log InCreate Account Checkout  Shopping Cart98 item(s)
2 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
2 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x UU Clips Pair Membrane to Filter, 2.5" to 2"
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
3 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x *Discontinued* RD106
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x 6th Stage pn215 Refillable inline DI filter (color change)
3 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x 752, DC Booster Pump w/ Transformer
6 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
3 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x .AR122 KoolerMax 6STAGE Aquarium Reef REVERSE OSMOSIS RODI WATER
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
2 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 4th stage Optional Refill bag #818 DI Resin Refill Bag
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
2 x 214, Clear Inline Filter Cartridge Empty Case
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Filter,
2 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
2 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x bulk205, Carbon Block Filter
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x IM60, Ice Maker or RV Water Filter, Inline Typle
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x Bundle Filter Annual set KPAK-104b Sediment Carbon Resin Refill
1 x FRQ850, Flow Restrictor 850ML / min
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x ERP500 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x *Discontinued* RO155
1 x KT-103, Optional Manual Membrane Flush Valve
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x WT-bac, Water Testing Kit, Bacteria Test
1 x 277, SED1005BB Big Blue 5 micron sediment filter 10"
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322

View Cart$6,341.84

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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