ABU, Bulkhead Union Connector [ABU]

$4.50

* 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:

Reviews

3 x	752, DC Booster Pump w/ Transformer
1 x	3rd stage C10 carbon block filter (replace every 6-12 months)
2 x	745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x	578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x	DM-1, Inline Dual TDS monitor (meter) for RO DI System DM1
1 x	CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x	532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
2 x	MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
2 x	6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
2 x	.AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
2 x	FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
4 x	532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x	531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x	Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
2 x	4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x	TMR-UV-6W, Replacement UV Ballast Transformer 6 Watts for 602 UV
1 x	WH-250, Whole House Water Treatment Sediment Carbon Filter Syste
2 x	KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x	7044-K Union Tee Connector Fitting Compression type 1/4"
1 x	671C, Replacement UV Lamp Light for 609C (16 Watt)
1 x	PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
2 x	Parts, Ro Water System Installation Parts Bag 1/4"
3 x	KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x	UU Clips Pair Membrane to Membrane, 2.5" to 2.5"
3 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x	720, Feed Water Adapter with Needle Valve
1 x	B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x	324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x	4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x	213, 5th stage inline carbon postfilter (replace every 12months)
1 x	752set, DC Booster Pump Transformer Solenoid Pressure Switch All
2 x	5th stage 225 Inline Alkaline filter with clear housing (annual)
2 x	PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x	532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x	MK8002, Maintenance kit for double membrane system RD322 RO260
1 x	SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x	Bundle Filter KPAK-104bm Sediment Carbon DI Resin Membrane
1 x	CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x	759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x	SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
2 x	733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x	3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
4 x	Optional: 564 Membrane Filter Housing Wrench Opener
1 x	CBV-38, Tank Ball Valve to 3/8 tubing
1 x	FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x	FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x	568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
1 x	Special, Single Stage Housing Bracket Shell Connection Kit
1 x	SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x	MKP, Maintenance kit for K5150P K6150P AR150P
1 x	205 2nd stage solid carbon block filter (replace every 12 month)
1 x	FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x	PE Tubing Tube Cutter
1 x	WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x	FRQ550, Flow Restrictor 500 to 600ML / min
1 x	204, 2nd stage GAC filter (replace every 6-12 months)
1 x	.RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x	ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x	MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x	Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x	818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x	335, 3rd stage TFC 35/45 US membrane filter (every 2-3 yrs)
1 x	318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x	4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x	723, Feed Water Adapter with Ball Valve
1 x	Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x	285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
2 x	FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x	KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
2 x	5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x	SC209, Specialty Filter Nitrate Removal Filter
1 x	MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x	DB40, DI Resin Refill Bag for DI210, RD322
1 x	718xl, Tubing 100 feet 1/4" white tube LLDPE PE for drinking wat
1 x	FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x	WH1134 Whole House Restaurant Filter System Sediment Carbon Big
1 x	Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x	PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x	799, Siphon Pump Drinking Water Liquid Fluid Oil Manual Trasfer
1 x	UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x	FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x	MK420, Maintenance kit for RO565
1 x	2nd stage C10 carbon block filter (replace every 6-12 months)
1 x	602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x	KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x	Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x	709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x	1st stage SF05 sediment filter (replace every 6-12 months)
1 x	205, 5th stage final carbon filter
2 x	FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x	Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
2 x	532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x	WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
2 x	201, 1st stage sediment filter (replace every 6-12 months)
1 x	WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x	Discontinued RD102
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x	CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x	DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x	CKV0402, Blue color Elbow Check Valve Elbow Type
1 x	4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x	PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x	FRQ420, Flow Restrictor 420ML / min
1 x	205, 3rd stage solid carbon block filter (replace every 12month)
1 x	225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x	HK120-P-TK-220V for EURO 220V / 50Hz
1 x	WS-150M, Whole House Water Softener
1 x	3rd stage Special High Efficiency Membrane Filter HTFC-150
1 x	2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x	673, Replacement UV Lamp Light for 602 (6 Watts)
1 x	BBK10, Replacement Filter Big Blue Whole House WH-1134
1 x	741-14, Diverter Valve for Countertop Water Units
1 x	205, 2nd stage carbon block filter (replace every 12 months)
2 x	6th Stage pn215 Refillable inline DI filter (color change)
1 x	701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x	Liter Digiflow 1/4NPT Digital Flow Meter count up total Water
1 x	335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x	Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x	UU Clips Pair Membrane to Filter, 2.5" to 2"
1 x	bulkic21, Koolermax Inline Carbon Filter

View Cart	$8,948.23

3 x	752, DC Booster Pump w/ Transformer
1 x	3rd stage C10 carbon block filter (replace every 6-12 months)
2 x	745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x	578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x	DM-1, Inline Dual TDS monitor (meter) for RO DI System DM1
1 x	CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x	532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
2 x	MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
2 x	6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
2 x	.AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
2 x	FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
4 x	532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x	531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x	Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
2 x	4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x	TMR-UV-6W, Replacement UV Ballast Transformer 6 Watts for 602 UV
1 x	WH-250, Whole House Water Treatment Sediment Carbon Filter Syste
2 x	KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x	7044-K Union Tee Connector Fitting Compression type 1/4"
1 x	671C, Replacement UV Lamp Light for 609C (16 Watt)
1 x	PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
2 x	Parts, Ro Water System Installation Parts Bag 1/4"
3 x	KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x	UU Clips Pair Membrane to Membrane, 2.5" to 2.5"
3 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x	720, Feed Water Adapter with Needle Valve
1 x	B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x	324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x	4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x	213, 5th stage inline carbon postfilter (replace every 12months)
1 x	752set, DC Booster Pump Transformer Solenoid Pressure Switch All
2 x	5th stage 225 Inline Alkaline filter with clear housing (annual)
2 x	PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x	532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x	MK8002, Maintenance kit for double membrane system RD322 RO260
1 x	SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x	Bundle Filter KPAK-104bm Sediment Carbon DI Resin Membrane
1 x	CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x	759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x	SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
2 x	733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x	3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
4 x	Optional: 564 Membrane Filter Housing Wrench Opener
1 x	CBV-38, Tank Ball Valve to 3/8 tubing
1 x	FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x	FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x	568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
1 x	Special, Single Stage Housing Bracket Shell Connection Kit
1 x	SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x	MKP, Maintenance kit for K5150P K6150P AR150P
1 x	205 2nd stage solid carbon block filter (replace every 12 month)
1 x	FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x	PE Tubing Tube Cutter
1 x	WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x	FRQ550, Flow Restrictor 500 to 600ML / min
1 x	204, 2nd stage GAC filter (replace every 6-12 months)
1 x	.RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x	ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x	MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x	Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x	818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x	335, 3rd stage TFC 35/45 US membrane filter (every 2-3 yrs)
1 x	318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x	4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x	723, Feed Water Adapter with Ball Valve
1 x	Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x	285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
2 x	FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x	KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
2 x	5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x	SC209, Specialty Filter Nitrate Removal Filter
1 x	MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x	DB40, DI Resin Refill Bag for DI210, RD322
1 x	718xl, Tubing 100 feet 1/4" white tube LLDPE PE for drinking wat
1 x	FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x	WH1134 Whole House Restaurant Filter System Sediment Carbon Big
1 x	Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x	PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x	799, Siphon Pump Drinking Water Liquid Fluid Oil Manual Trasfer
1 x	UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x	FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x	MK420, Maintenance kit for RO565
1 x	2nd stage C10 carbon block filter (replace every 6-12 months)
1 x	602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x	KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x	Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x	709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x	1st stage SF05 sediment filter (replace every 6-12 months)
1 x	205, 5th stage final carbon filter
2 x	FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x	Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
2 x	532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x	WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
2 x	201, 1st stage sediment filter (replace every 6-12 months)
1 x	WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x	Discontinued RD102
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x	CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x	DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x	CKV0402, Blue color Elbow Check Valve Elbow Type
1 x	4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x	PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x	FRQ420, Flow Restrictor 420ML / min
1 x	205, 3rd stage solid carbon block filter (replace every 12month)
1 x	225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x	HK120-P-TK-220V for EURO 220V / 50Hz
1 x	WS-150M, Whole House Water Softener
1 x	3rd stage Special High Efficiency Membrane Filter HTFC-150
1 x	2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x	673, Replacement UV Lamp Light for 602 (6 Watts)
1 x	BBK10, Replacement Filter Big Blue Whole House WH-1134
1 x	741-14, Diverter Valve for Countertop Water Units
1 x	205, 2nd stage carbon block filter (replace every 12 months)
2 x	6th Stage pn215 Refillable inline DI filter (color change)
1 x	701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x	Liter Digiflow 1/4NPT Digital Flow Meter count up total Water
1 x	335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x	Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x	UU Clips Pair Membrane to Filter, 2.5" to 2"
1 x	bulkic21, Koolermax Inline Carbon Filter

View Cart	$8,948.23