Log In Log In  |  Checkout   |  53 item(s)
1 x KF750, Elite Series: Polish Chrome Drinking Water Faucet
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x CDP6800, AQUATEC CDP6800 Booster Pump Only 6840-2J03-B224
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
2 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x bulk201, Sediment Filter
1 x AQUATEC 8852-2J03-B424 High Flow Booster Pump 110V Transformer
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x KT-103, Optional Manual Membrane Flush Valve
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
2 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x PH80, Digital pH Meter Hydrotester Calibration Storage Solutions
1 x Liter Digiflow 1/4NPT Digital Flow Meter count up total Water
1 x AQF-600-105, Flow Meter Panel Mount 1/2" MPT
2 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x IM60, Ice Maker or RV Water Filter, Inline Typle
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
1 x KF310, Elite Series: Polish Chrome Drinking Water Faucet
1 x 1/2" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)

View Cart$2,733.88
Specials Log InCreate Account Checkout  Shopping Cart53 item(s)
1 x KF750, Elite Series: Polish Chrome Drinking Water Faucet
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x CDP6800, AQUATEC CDP6800 Booster Pump Only 6840-2J03-B224
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
2 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x bulk201, Sediment Filter
1 x AQUATEC 8852-2J03-B424 High Flow Booster Pump 110V Transformer
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x KT-103, Optional Manual Membrane Flush Valve
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
2 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x PH80, Digital pH Meter Hydrotester Calibration Storage Solutions
1 x Liter Digiflow 1/4NPT Digital Flow Meter count up total Water
1 x AQF-600-105, Flow Meter Panel Mount 1/2" MPT
2 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x IM60, Ice Maker or RV Water Filter, Inline Typle
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
1 x KF310, Elite Series: Polish Chrome Drinking Water Faucet
1 x 1/2" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)

View Cart$2,733.88

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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