Log In Log In  |  Checkout   |  57 item(s)
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 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
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
4 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
2 x 205, 3rd stage solid carbon block filter (replace every 12 month
2 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x 365, 4th stage TFC 50/65 US membrane filter (replace 2-3 yrs)
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
2 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x *Discontinued* RO155
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x *Discontinued* RO585NTF
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x FM-8100TG44, DigiFlow Digital Water Flow Rate Meter
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x Panel 1/2" 6710M-44TM Digital Flow Meter count up Gallon 115V
1 x *Discontinued* RO155C
2 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x .K6150PNTF, KoolerMax K6150P RO System Shell without tank faucet
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x KF320, Elite Series: Brushed Nickel / Stainless Steel Faucet
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)

View Cart$3,611.90
Specials Log InCreate Account Checkout  Shopping Cart57 item(s)
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 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
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
4 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
2 x 205, 3rd stage solid carbon block filter (replace every 12 month
2 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x 365, 4th stage TFC 50/65 US membrane filter (replace 2-3 yrs)
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
2 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x *Discontinued* RO155
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x *Discontinued* RO585NTF
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x FM-8100TG44, DigiFlow Digital Water Flow Rate Meter
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x Panel 1/2" 6710M-44TM Digital Flow Meter count up Gallon 115V
1 x *Discontinued* RO155C
2 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x .K6150PNTF, KoolerMax K6150P RO System Shell without tank faucet
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x KF320, Elite Series: Brushed Nickel / Stainless Steel Faucet
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)

View Cart$3,611.90

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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