Log In Log In  |  Checkout   |  92 item(s)
3 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
2 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
2 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
3 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x *Discontinued* RO155
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
2 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
4 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x KF320, Elite Series: Brushed Nickel / Stainless Steel Faucet
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
3 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 706, Membrane Filter Casing Housing Assembly
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x HK120 KoolerMax Aeroponics Hydroponics 150G RO Filtration System
1 x WS-150M, Whole House Water Softener
1 x KF355, Antique Brushed Brass / Iron Finish Drinking Water Faucet
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 326, 3rd stage TFC 24 /26 US membrane filter (replace 2-3 yrs)
2 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x KF612, Elite Series: Oil Rubbed Bronze ORB Drinking Water Faucet
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x *Discontinued* RO585
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Filter,
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265

View Cart$7,439.40
Specials Log InCreate Account Checkout  Shopping Cart92 item(s)
3 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
2 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
2 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
3 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x *Discontinued* RO155
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
2 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
4 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x KF320, Elite Series: Brushed Nickel / Stainless Steel Faucet
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
3 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 706, Membrane Filter Casing Housing Assembly
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x HK120 KoolerMax Aeroponics Hydroponics 150G RO Filtration System
1 x WS-150M, Whole House Water Softener
1 x KF355, Antique Brushed Brass / Iron Finish Drinking Water Faucet
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 326, 3rd stage TFC 24 /26 US membrane filter (replace 2-3 yrs)
2 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x KF612, Elite Series: Oil Rubbed Bronze ORB Drinking Water Faucet
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x *Discontinued* RO585
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Filter,
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265

View Cart$7,439.40

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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