Log In Log In  |  Checkout   |  35 item(s)
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
2 x *Discontinued* RD106
1 x DI210, Heavy-duty DI system for Aquarium and Reef
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x KT-103, Optional Manual Membrane Flush Valve
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x .AR150PNTF, KoolerMax AR150P RO System Shell without tank faucet
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x .AR122 KoolerMax 6STAGE Aquarium Reef REVERSE OSMOSIS RODI WATER
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x *Discontinued* RD102
1 x .RD322 Aquarium 260-300 GPD REVERSE OSMOSIS RO+DI WATER SYSTEM
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x *Discontinued* RD150
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x SET8855 Aquatec 5853 Booster Pump Assembly for Aeroponics System
1 x MK420, Maintenance kit for RO565
1 x AQUATEC CDP 8852-2J03-B424 Booster Pump 220V Euro Transformer
1 x 3/4" NPT Digiflow Digital Flow Meter count up total Water Gallon

View Cart$3,590.50
Specials Log InCreate Account Checkout  Shopping Cart35 item(s)
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
2 x *Discontinued* RD106
1 x DI210, Heavy-duty DI system for Aquarium and Reef
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x KT-103, Optional Manual Membrane Flush Valve
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x .AR150PNTF, KoolerMax AR150P RO System Shell without tank faucet
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x .AR122 KoolerMax 6STAGE Aquarium Reef REVERSE OSMOSIS RODI WATER
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x *Discontinued* RD102
1 x .RD322 Aquarium 260-300 GPD REVERSE OSMOSIS RO+DI WATER SYSTEM
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x *Discontinued* RD150
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x SET8855 Aquatec 5853 Booster Pump Assembly for Aeroponics System
1 x MK420, Maintenance kit for RO565
1 x AQUATEC CDP 8852-2J03-B424 Booster Pump 220V Euro Transformer
1 x 3/4" NPT Digiflow Digital Flow Meter count up total Water Gallon

View Cart$3,590.50

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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