Log In Log In  |  Checkout   |  59 item(s)
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x EMT-10, Empty Filter Cartridge Casing Housing
4 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x 741-14, Diverter Valve for Countertop Water Units
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
2 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x WH-250, Whole House Water Treatment Sediment Carbon Filter Syste
1 x 706, Membrane Filter Casing Housing Assembly
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 723, Feed Water Adapter with Ball Valve
1 x Panel 3/4" 6710M-66TM Digital Flow Meter count up GPM 115V
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x .RD322 Aquarium 260-300 GPD REVERSE OSMOSIS RO+DI WATER SYSTEM
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x .AR122 KoolerMax 6STAGE Aquarium Reef REVERSE OSMOSIS RODI WATER
1 x .AR150PNTF, KoolerMax AR150P RO System Shell without tank faucet
1 x 316, 2nd stage CTA 16 US Membrane filter
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x FM-8000T, DigiFlow Digital Water Flow Meter Rate Count Down
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter

View Cart$5,306.49
Specials Log InCreate Account Checkout  Shopping Cart59 item(s)
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x EMT-10, Empty Filter Cartridge Casing Housing
4 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x 741-14, Diverter Valve for Countertop Water Units
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
2 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x WH-250, Whole House Water Treatment Sediment Carbon Filter Syste
1 x 706, Membrane Filter Casing Housing Assembly
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 723, Feed Water Adapter with Ball Valve
1 x Panel 3/4" 6710M-66TM Digital Flow Meter count up GPM 115V
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x .RD322 Aquarium 260-300 GPD REVERSE OSMOSIS RO+DI WATER SYSTEM
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x .AR122 KoolerMax 6STAGE Aquarium Reef REVERSE OSMOSIS RODI WATER
1 x .AR150PNTF, KoolerMax AR150P RO System Shell without tank faucet
1 x 316, 2nd stage CTA 16 US Membrane filter
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x FM-8000T, DigiFlow Digital Water Flow Meter Rate Count Down
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter

View Cart$5,306.49

ARD, Reducer Fitting Straight Tube OD Stem OD [ARD]

$3.50

ARD, Reducer Fitting Straight Tube OD Stem OD



* ARD, Reducer Fitting Straight Tube OD Stem OD

* Please choose size from the selection box below. First number is tubing OD and second number is Stem OD Outside Diameter (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 3/8" Stem OD ARD0406
* 3/8" Tube OD x 1/2" Stem OD ARD0607


* 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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