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1 x 720, Feed Water Adapter with Needle Valve
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x Aeroponics HighPressure Booster Pump Aquatec CDP5853 Transformer
1 x KT-103, Optional Manual Membrane Flush Valve
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x Special, Single Stage Housing Bracket Shell Connection Kit
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x BBK10, Replacement Filter Big Blue Whole House WH-1134
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x KF612, Elite Series: Oil Rubbed Bronze ORB Drinking Water Faucet
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x HK120-PUMP KoolerMax Aeroponics Hydroponics System Booster Pump
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 706, Membrane Filter Casing Housing Assembly
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x 1st stage SF05 sediment filter (replace every 6-12 months)

View Cart$2,939.69
Specials Log InCreate Account Checkout  Shopping Cart53 item(s)
1 x 720, Feed Water Adapter with Needle Valve
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x Aeroponics HighPressure Booster Pump Aquatec CDP5853 Transformer
1 x KT-103, Optional Manual Membrane Flush Valve
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x Special, Single Stage Housing Bracket Shell Connection Kit
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x BBK10, Replacement Filter Big Blue Whole House WH-1134
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x KF612, Elite Series: Oil Rubbed Bronze ORB Drinking Water Faucet
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x HK120-PUMP KoolerMax Aeroponics Hydroponics System Booster Pump
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 706, Membrane Filter Casing Housing Assembly
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x 1st stage SF05 sediment filter (replace every 6-12 months)

View Cart$2,939.69

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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