Log In Log In  |  Checkout   |  75 item(s)
1 x KF511, Polished Chrome Cross-Handle with Gold Trim Faucet
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x Annual Filter Kit Koolermax Series KPAK-3 Sediment Carbon Block
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
3 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
1 x N-14-1M, Nipple Fitting connector between standard RO housing
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 5th Stage pn215 Refillable inline DI filter (color change)
1 x WS-150M, Whole House Water Softener
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x WH-250, Whole House Water Treatment Sediment Carbon Filter Syste

View Cart$8,145.54
Specials Log InCreate Account Checkout  Shopping Cart75 item(s)
1 x KF511, Polished Chrome Cross-Handle with Gold Trim Faucet
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x Annual Filter Kit Koolermax Series KPAK-3 Sediment Carbon Block
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
3 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
1 x N-14-1M, Nipple Fitting connector between standard RO housing
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 5th Stage pn215 Refillable inline DI filter (color change)
1 x WS-150M, Whole House Water Softener
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x WH-250, Whole House Water Treatment Sediment Carbon Filter Syste

View Cart$8,145.54

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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