Log In Log In  |  Checkout   |  58 item(s)
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x 310, 2nd stage CTA 10 US Membrane filter
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x *Discontinued* RD106
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x Special Filter Kit Koolermax dealer distribution kit
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x .AR122 KoolerMax 6STAGE Aquarium Reef REVERSE OSMOSIS RODI WATER
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
2 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
2 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
2 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x 201, 1st stage sediment filter (replace every 6-12 months)
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter

View Cart$2,285.33
Specials Log InCreate Account Checkout  Shopping Cart58 item(s)
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x 310, 2nd stage CTA 10 US Membrane filter
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x *Discontinued* RD106
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x Special Filter Kit Koolermax dealer distribution kit
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x .AR122 KoolerMax 6STAGE Aquarium Reef REVERSE OSMOSIS RODI WATER
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
2 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
2 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
2 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x 201, 1st stage sediment filter (replace every 6-12 months)
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter

View Cart$2,285.33

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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