Log In Log In  |  Checkout   |  56 item(s)
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
2 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Dispense
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
3 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x HK120-P-TK-220V for EURO 220V / 50Hz
1 x UU Clips Pair Standard Filter to Standard Filter, 2" x 2"
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x bulk201, Sediment Filter
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
2 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
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 Bundle Filter KPAK-104bm Sediment Carbon DI Resin Membrane
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x 752, DC Booster Pump w/ Transformer
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x Bundle Filter KPAK-104m Sediment Carbon Block DI Resin Membrane
1 x 4th stage Optional Refill bag #818 DI Resin Refill Bag
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106

View Cart$5,621.47
Specials Log InCreate Account Checkout  Shopping Cart56 item(s)
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
2 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Dispense
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
3 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x HK120-P-TK-220V for EURO 220V / 50Hz
1 x UU Clips Pair Standard Filter to Standard Filter, 2" x 2"
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x bulk201, Sediment Filter
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
2 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
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 Bundle Filter KPAK-104bm Sediment Carbon DI Resin Membrane
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x 752, DC Booster Pump w/ Transformer
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x Bundle Filter KPAK-104m Sediment Carbon Block DI Resin Membrane
1 x 4th stage Optional Refill bag #818 DI Resin Refill Bag
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106

View Cart$5,621.47

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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