Log In Log In  |  Checkout   |  43 item(s)
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
4 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
1 x 277, SED1005BB Big Blue 5 micron sediment filter 10"
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
1 x 565, Digital Pressure Gauge Tester Monitor
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x Bundle Filter KPAK-104m Sediment Carbon Block DI Resin Membrane
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
1 x Liter Digiflow 1/4NPT Digital Flow Meter count up total Water
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)

View Cart$3,988.95
Specials Log InCreate Account Checkout  Shopping Cart43 item(s)
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
4 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
1 x 277, SED1005BB Big Blue 5 micron sediment filter 10"
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
1 x 565, Digital Pressure Gauge Tester Monitor
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x Bundle Filter KPAK-104m Sediment Carbon Block DI Resin Membrane
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
1 x Liter Digiflow 1/4NPT Digital Flow Meter count up total Water
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)

View Cart$3,988.95

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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