Log In Log In  |  Checkout   |  23 item(s)
1 x KF511, Polished Chrome Cross-Handle with Gold Trim Faucet
1 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
1 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
1 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

View Cart$3,183.44
Specials Log InCreate Account Checkout  Shopping Cart23 item(s)
1 x KF511, Polished Chrome Cross-Handle with Gold Trim Faucet
1 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
1 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
1 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

View Cart$3,183.44

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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