Log In Log In  |  Checkout   |  43 item(s)
1 x 578, TDS Water Quality Meter tds-3
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
2 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 5th Stage pn215 Refillable inline DI filter (color change)
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x 214, Clear Inline Filter Cartridge Empty Case
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x *Discontinued* RD106
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x DM-1, Inline Dual TDS monitor (meter) for RO DI System DM1
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x 6th Stage pn215 Refillable inline DI filter (color change)
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x *Discontinued* RD102
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi

View Cart$4,242.95
Specials Log InCreate Account Checkout  Shopping Cart43 item(s)
1 x 578, TDS Water Quality Meter tds-3
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
2 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 5th Stage pn215 Refillable inline DI filter (color change)
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x 214, Clear Inline Filter Cartridge Empty Case
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x *Discontinued* RD106
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x DM-1, Inline Dual TDS monitor (meter) for RO DI System DM1
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x 6th Stage pn215 Refillable inline DI filter (color change)
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x *Discontinued* RD102
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi

View Cart$4,242.95

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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