Log In Log In  |  Checkout   |  43 item(s)
1 x 310, 2nd stage CTA 10 US Membrane filter
2 x Parts, Ro Water System Installation Parts Bag 1/4"
2 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x ERP500 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x 4th stage Optional Refill bag #818 DI Resin Refill Bag
1 x 4th Stage Color Changing DI Filter SC207 for AR-104H
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x AQUATEC 8852-2J03-B424 High Flow Booster Pump 110V Transformer
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x DDP5800, Aquatec Demand Delivery Pump 5851-7E12 Increase Output
2 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x 752, DC Booster Pump w/ Transformer
1 x KT-103, Optional Manual Membrane Flush Valve
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x SET8855-300 Aquatec 5853 Booster Pump Assembly for 300GPD RO Sys
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste

View Cart$2,065.95
Specials Log InCreate Account Checkout  Shopping Cart43 item(s)
1 x 310, 2nd stage CTA 10 US Membrane filter
2 x Parts, Ro Water System Installation Parts Bag 1/4"
2 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x ERP500 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x 4th stage Optional Refill bag #818 DI Resin Refill Bag
1 x 4th Stage Color Changing DI Filter SC207 for AR-104H
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x AQUATEC 8852-2J03-B424 High Flow Booster Pump 110V Transformer
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x DDP5800, Aquatec Demand Delivery Pump 5851-7E12 Increase Output
2 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x 752, DC Booster Pump w/ Transformer
1 x KT-103, Optional Manual Membrane Flush Valve
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x SET8855-300 Aquatec 5853 Booster Pump Assembly for 300GPD RO Sys
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste

View Cart$2,065.95

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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