Log In Log In  |  Checkout   |  143 item(s)
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
2 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
4 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
3 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
3 x 205 2nd stage solid carbon block filter (replace every 12 month)
5 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
3 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
4 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
2 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
3 x 205, 3rd stage solid carbon block filter (replace every 12month)
3 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x .K5150P, KoolerMax 150GPD 5 Stage RO System w/Booster Pump
2 x EMT-10, Empty Filter Cartridge Casing Housing
1 x *Discontinued* RO6ALK
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
3 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
2 x 752, DC Booster Pump w/ Transformer
1 x 277, SED1005BB Big Blue 5 micron sediment filter 10"
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x FM-8000T, DigiFlow Digital Water Flow Meter Rate Count Down
2 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
2 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR104H
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x .AR122 KoolerMax 6STAGE Aquarium Reef REVERSE OSMOSIS RODI WATER
2 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
2 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x 4th stage Optional Refill bag #818 DI Resin Refill Bag
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x FRQ850, Flow Restrictor 850ML / min
1 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x KT-103, Optional Manual Membrane Flush Valve
1 x WH-250, Whole House Water Treatment Sediment Carbon Filter Syste
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 723, Feed Water Adapter with Ball Valve
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 578, TDS Water Quality Meter tds-3
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x 3rd stage Special High Efficiency Membrane Filter HTFC-150
1 x KF612, Elite Series: Oil Rubbed Bronze ORB Drinking Water Faucet
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
1 x 3/4" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x 310, 2nd stage CTA 10 US Membrane filter
1 x FRQ200, Flow Restrictor 200ML / min
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
2 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x 1/2" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x 565, Digital Pressure Gauge Tester Monitor
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x *Discontinued* RD106
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x 316UP, Upgrade for CTA20 gal/day (includes US Membrane filter)
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 719, Drain Saddle Clamp / Valve
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter

View Cart$6,600.62
Specials Log InCreate Account Checkout  Shopping Cart143 item(s)
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
2 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
4 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
3 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
3 x 205 2nd stage solid carbon block filter (replace every 12 month)
5 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
3 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
4 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
2 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
3 x 205, 3rd stage solid carbon block filter (replace every 12month)
3 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x .K5150P, KoolerMax 150GPD 5 Stage RO System w/Booster Pump
2 x EMT-10, Empty Filter Cartridge Casing Housing
1 x *Discontinued* RO6ALK
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
3 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
2 x 752, DC Booster Pump w/ Transformer
1 x 277, SED1005BB Big Blue 5 micron sediment filter 10"
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x FM-8000T, DigiFlow Digital Water Flow Meter Rate Count Down
2 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
2 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR104H
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x .AR122 KoolerMax 6STAGE Aquarium Reef REVERSE OSMOSIS RODI WATER
2 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
2 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x 4th stage Optional Refill bag #818 DI Resin Refill Bag
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x FRQ850, Flow Restrictor 850ML / min
1 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x KT-103, Optional Manual Membrane Flush Valve
1 x WH-250, Whole House Water Treatment Sediment Carbon Filter Syste
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 723, Feed Water Adapter with Ball Valve
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 578, TDS Water Quality Meter tds-3
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x 3rd stage Special High Efficiency Membrane Filter HTFC-150
1 x KF612, Elite Series: Oil Rubbed Bronze ORB Drinking Water Faucet
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
1 x 3/4" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x 310, 2nd stage CTA 10 US Membrane filter
1 x FRQ200, Flow Restrictor 200ML / min
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
2 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x 1/2" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x 565, Digital Pressure Gauge Tester Monitor
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x *Discontinued* RD106
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x 316UP, Upgrade for CTA20 gal/day (includes US Membrane filter)
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 719, Drain Saddle Clamp / Valve
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter

View Cart$6,600.62

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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