Log In Log In  |  Checkout   |  62 item(s)
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
3 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
3 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 723, Feed Water Adapter with Ball Valve
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
2 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x bulksf05, Koolermax Sediment Filter
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT

View Cart$1,897.36
Specials Log InCreate Account Checkout  Shopping Cart62 item(s)
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
3 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
3 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 723, Feed Water Adapter with Ball Valve
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
2 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x bulksf05, Koolermax Sediment Filter
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT

View Cart$1,897.36

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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