Log In Log In  |  Checkout   |  53 item(s)
1 x *Discontinued* RO585
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
3 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 4th Stage Color Changing DI Filter SC207 for AR-104H
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x *Discontinued* RD106
1 x DI210, Heavy-duty DI system for Aquarium and Reef
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
2 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x WS-150M, Whole House Water Softener
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
2 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 706, Membrane Filter Casing Housing Assembly
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 752, DC Booster Pump w/ Transformer
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)

View Cart$8,075.40
Specials Log InCreate Account Checkout  Shopping Cart53 item(s)
1 x *Discontinued* RO585
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
3 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 4th Stage Color Changing DI Filter SC207 for AR-104H
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x *Discontinued* RD106
1 x DI210, Heavy-duty DI system for Aquarium and Reef
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
2 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x WS-150M, Whole House Water Softener
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
2 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 706, Membrane Filter Casing Housing Assembly
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 752, DC Booster Pump w/ Transformer
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)

View Cart$8,075.40

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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