Log In Log In  |  Checkout   |  42 item(s)
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 720, Feed Water Adapter with Needle Valve
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x 205, 2nd stage carbon block filter (replace every 12 months)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x Aeroponics HighPressure Booster Pump Aquatec CDP5853 Transformer
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x *Discontinued* RO585A
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
3 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
2 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
2 x EMT-10, Empty Filter Cartridge Casing Housing
2 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134

View Cart$1,403.00
Specials Log InCreate Account Checkout  Shopping Cart42 item(s)
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 720, Feed Water Adapter with Needle Valve
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x 205, 2nd stage carbon block filter (replace every 12 months)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x Aeroponics HighPressure Booster Pump Aquatec CDP5853 Transformer
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x *Discontinued* RO585A
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
3 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
2 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
2 x EMT-10, Empty Filter Cartridge Casing Housing
2 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134

View Cart$1,403.00

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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