Log In Log In  |  Checkout   |  44 item(s)
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 365, 4th stage TFC 50/65 US membrane filter (replace 2-3 yrs)
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x bulk201, Sediment Filter
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x N-14-1M, Nipple Fitting connector between standard RO housing
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x DB40, DI Resin Refill Bag for DI210, RD322
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x bulksf05, Koolermax Sediment Filter
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x *Discontinued* RO155
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste

View Cart$2,301.48
Specials Log InCreate Account Checkout  Shopping Cart44 item(s)
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 365, 4th stage TFC 50/65 US membrane filter (replace 2-3 yrs)
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x bulk201, Sediment Filter
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x N-14-1M, Nipple Fitting connector between standard RO housing
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x DB40, DI Resin Refill Bag for DI210, RD322
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x bulksf05, Koolermax Sediment Filter
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x *Discontinued* RO155
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste

View Cart$2,301.48

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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