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1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x bulk213, Inline Carbon Filter
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x 706, Membrane Filter Casing Housing Assembly

View Cart$1,426.75
Specials Log InCreate Account Checkout  Shopping Cart35 item(s)
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x bulk213, Inline Carbon Filter
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x 706, Membrane Filter Casing Housing Assembly

View Cart$1,426.75

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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