Log In Log In  |  Checkout   |  53 item(s)
4 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
3 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x TMR-DC-2412, Transformer Power Supply for #752 Booster Pump
1 x 578, TDS Water Quality Meter tds-3
1 x *Discontinued* RO155C
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
2 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x Bundle Filter Annual set KPAK-104b Sediment Carbon Resin Refill
1 x *Discontinued* RO155
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x *Discontinued* RO585ERP
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
2 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Filter,
1 x KF511, Polished Chrome Cross-Handle with Gold Trim Faucet
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 718xl, Tubing 100 feet 1/4" white tube LLDPE PE for drinking wat
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350

View Cart$2,532.50
Specials Log InCreate Account Checkout  Shopping Cart53 item(s)
4 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
3 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x TMR-DC-2412, Transformer Power Supply for #752 Booster Pump
1 x 578, TDS Water Quality Meter tds-3
1 x *Discontinued* RO155C
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
2 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x Bundle Filter Annual set KPAK-104b Sediment Carbon Resin Refill
1 x *Discontinued* RO155
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x *Discontinued* RO585ERP
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
2 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Filter,
1 x KF511, Polished Chrome Cross-Handle with Gold Trim Faucet
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 718xl, Tubing 100 feet 1/4" white tube LLDPE PE for drinking wat
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350

View Cart$2,532.50

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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