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

14 x	Optional: 564 Membrane Filter Housing Wrench Opener
4 x	MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle AR104H
2 x	Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
2 x	215, 5th or 6th Stage Refillable inline DI filter (color change)
8 x	201, 1st stage sediment filter (replace every 6-12 months)
3 x	BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
8 x	733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
5 x	CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
2 x	Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
2 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
2 x	Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
5 x	MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
6 x	Parts, Ro Water System Installation Parts Bag 1/4"
5 x	1st stage SF05 sediment filter (replace every 6-12 months)
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
9 x	532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
7 x	205, 3rd stage solid carbon block filter (replace every 12month)
2 x	3rd stage C10 carbon block filter (replace every 6-12 months)
2 x	6th Stage pn215 Refillable inline DI filter (color change)
5 x	Optional 566 Filter Housing Wrench Case Opener KoolerMax System
3 x	213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x	RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
4 x	KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
12 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
2 x	NM-5104, HONEYWELL COUNTERTOP WATER FILTER DISCONTINUED SW1
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
3 x	B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
3 x	399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
6 x	Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x	bulk205, Carbon Block Filter
3 x	B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
3 x	O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x	bulkic21, Koolermax Inline Carbon Filter
3 x	KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x	Special, Single Stage Housing Bracket Shell Connection Kit
1 x	bulk213, Inline Carbon Filter
4 x	Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
2 x	3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
2 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
2 x	Special, Output Conversion Kit Convert from 1/4" to 3/8"
2 x	Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x	5th Stage pn215 Refillable inline DI filter (color change)
2 x	4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x	Conversion Kit, Convert Aquarium to Drinking RO Water System
7 x	205 2nd stage solid carbon block filter (replace every 12 month)
5 x	OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
2 x	NM-5102, HONEYWELL COUNTERTOP WATER FILTER DISCONTINUED SW1
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
2 x	335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
2 x	5th stage 225 Inline Alkaline filter with clear housing (annual)
3 x	2nd stage C10 carbon block filter (replace every 6-12 months)
2 x	.AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
6 x	532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
4 x	752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x	PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x	Discontinued RO585NTF
3 x	531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x	Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x	Panel 1/4 Digital Flow Meter count up total Gallons GPM 56"cable
3 x	MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x	318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x	.K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x	UU Clips Pair Membrane to Membrane, 2.5" to 2.5"
3 x	.RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
2 x	285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x	Panel 3/4" 6710M-66TM Digital Flow Meter count up GPM 115V
1 x	.K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
2 x	BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x	Bundle Filter KPAK-104m Sediment Carbon Block DI Resin Membrane
2 x	FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x	310, 2nd stage CTA 10 US Membrane filter
1 x	3/4" NPT Digiflow Digital Flow Meter count up total Water Gallon
2 x	225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x	578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x	FM214G 1/4" NPT Digital Flow Meter count up total Water Gallons
2 x	PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x	.K6A KoolerMax 75GPD 6STAGE Alkaline pH REVERSE OSMOSIS RO FILTE
2 x	290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x	DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x	.K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
3 x	532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x	UU Clips Pair from Bracket to Membrane Filter
1 x	741-14, Diverter Valve for Countertop Water Units
1 x	PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x	316UP, Upgrade for CTA20 gal/day (includes US Membrane filter)
4 x	752, DC Booster Pump w/ Transformer
3 x	1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
2 x	581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
2 x	578, TDS Water Quality Meter tds-3
1 x	SET8855 Aquatec 5853 Booster Pump Assembly for Aeroponics System
1 x	Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x	KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
3 x	818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x	HK120 KoolerMax Aeroponics Hydroponics 150G RO Filtration System
1 x	BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x	Liter Digiflow 1/4NPT Digital Flow Meter count up total Water
1 x	FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x	.K6150PNTF, KoolerMax K6150P RO System Shell without tank faucet
1 x	FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x	204, 2nd stage GAC filter (replace every 6-12 months)
1 x	215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x	FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x	MK8002, Maintenance kit for double membrane system RD322 RO260
1 x	FM-8000T, DigiFlow Digital Water Flow Meter Rate Count Down
1 x	799, Siphon Pump Drinking Water Liquid Fluid Oil Manual Trasfer
1 x	Discontinued RO155
1 x	AQF-600-105, Flow Meter Panel Mount 1/2" MPT
2 x	385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x	KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x	1/2" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x	913, 5th stage inline carbon filter (every 12 months)
2 x	KT-103, Optional Manual Membrane Flush Valve
1 x	FM-8100TG44, DigiFlow Digital Water Flow Rate Meter
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
2 x	DM-1, Inline Dual TDS monitor (meter) for RO DI System DM1
1 x	FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
2 x	.AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x	324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x	205, 3rd stage solid carbon block filter (replace every 12 month
1 x	HK120-P-TK-220V for EURO 220V / 50Hz
2 x	335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
2 x	755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x	288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
1 x	Discontinued RD106
1 x	Discontinued RO585
1 x	SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x	SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
1 x	IM60, Ice Maker or RV Water Filter, Inline Typle
1 x	Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
1 x	HK120-PUMP KoolerMax Aeroponics Hydroponics System Booster Pump
1 x	PE Tubing Tube Cutter
1 x	759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x	732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x	4th Stage Color Changing DI Filter SC207 for AR-104H
2 x	PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
2 x	PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x	213, 5th stage inline carbon postfilter (replace every 12months)
1 x	Bundle Filter Annual set KPAK-104b Sediment Carbon Resin Refill
2 x	.AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x	TMR-UV-6W, Replacement UV Ballast Transformer 6 Watts for 602 UV
1 x	B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
2 x	565, Digital Pressure Gauge Tester Monitor
1 x	706, Membrane Filter Casing Housing Assembly
1 x	MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x	2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x	5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x	3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
2 x	214, Clear Inline Filter Cartridge Empty Case
1 x	SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x	Micro 1/4 NPT Digital Flow Meter count up total Water Liter LPM
1 x	HK120-P-TK for USA 110V / 60Hz
1 x	316, 2nd stage CTA 16 US Membrane filter
1 x	UU Clips Pair Standard Filter to Standard Filter, 2" x 2"
2 x	Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x	350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
3 x	701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x	Bundle Filter KPAK-104bm Sediment Carbon DI Resin Membrane
2 x	745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x	FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
1 x	KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x	.K6NTF KoolerMax K6ALK RO shell without tank and faucet
1 x	Discontinued RO585ERP
1 x	3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x	.K5150P, KoolerMax 150GPD 5 Stage RO System w/Booster Pump
1 x	FM214G, FM-6710M DigiFlow Digital Water Flow Meter Gauge Moniter
2 x	701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x	3rd stage Special High Efficiency Membrane Filter HTFC-150
1 x	532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x	PH80, Digital pH Meter Hydrotester Calibration Storage Solutions
1 x	Discontinued RO155C
1 x	DB40, DI Resin Refill Bag for DI210, RD322
1 x	SW SHELL, Countertop SW1 Empty System Only No Filter
1 x	FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x	PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x	671C, Replacement UV Lamp Light for 609C (16 Watt)
1 x	TMR-AQT-2A, Transformer Power Supply Aquatec TACS114-48 for 8800
1 x	.SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x	FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x	SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
3 x	CKV0402, Blue color Elbow Check Valve Elbow Type
2 x	6044-combo Compression Type Fitting Elbow and Tee fitting
1 x	205, 2nd stage carbon block filter (replace every 12 months)
1 x	WH-250, Whole House Water Treatment Sediment Carbon Filter Syste
2 x	CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x	SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
2 x	4044-K qty 2 Male Elbow Fitting Compression type 1/4"
2 x	720, Feed Water Adapter with Needle Valve
1 x	SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x	SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
1 x	MKP, Maintenance kit for K5150P K6150P AR150P
1 x	KF355, Antique Brushed Brass / Iron Finish Drinking Water Faucet
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x	PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x	756SET, Aquatec Permeate Pump Reverse Osmosis System ERP1000
1 x	SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x	WS-150M, Whole House Water Softener
1 x	DI210, Heavy-duty DI system for Aquarium and Reef
1 x	FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x	WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x	602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x	719, Drain Saddle Clamp / Valve
1 x	709, Automatic Shut Off Valve 4-way Four Way Valve
1 x	2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x	550, Standard Chrome Steel Faucet with Spigot for Water Filter,
1 x	KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x	CBV-38, Tank Ball Valve to 3/8 tubing
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	FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x	FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x	UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x	FRQ550, Flow Restrictor 500 to 600ML / min
1 x	723, Feed Water Adapter with Ball Valve
1 x	.RD322 Aquarium 260-300 GPD REVERSE OSMOSIS RO+DI WATER SYSTEM
1 x	202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x	721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x	SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x	CDP6800, AQUATEC CDP6800 Booster Pump Only 6840-2J03-B224
1 x	WSACF-150T, Whole House Water Treatment ACF-150T
1 x	741-38, Diverter Valve for RO DI Water Systems
1 x	WH-20, Whole House Water Treatment Carbon Block Filter System Bi

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