Log In Log In  |  Checkout   |  33 item(s)
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x bulk201, Sediment Filter
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
2 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
2 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x DM-1, Inline Dual TDS monitor (meter) for RO DI System DM1
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)

View Cart$2,536.48
Specials Log InCreate Account Checkout  Shopping Cart33 item(s)
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x bulk201, Sediment Filter
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
2 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
2 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x DM-1, Inline Dual TDS monitor (meter) for RO DI System DM1
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)

View Cart$2,536.48

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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