Log In Log In  |  Checkout   |  59 item(s)
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x 310, 2nd stage CTA 10 US Membrane filter
2 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
1 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 205, 5th stage final carbon filter
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x 205, 2nd stage carbon block filter (replace every 12 months)
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x WH-250, Whole House Water Treatment Sediment Carbon Filter Syste
1 x WS-150M, Whole House Water Softener
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
2 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
1 x 316UP, Upgrade for CTA20 gal/day (includes US Membrane filter)
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 706, Membrane Filter Casing Housing Assembly
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x Special Filter Kit Koolermax dealer distribution kit
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker

View Cart$5,127.85
Specials Log InCreate Account Checkout  Shopping Cart59 item(s)
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x 310, 2nd stage CTA 10 US Membrane filter
2 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
1 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 205, 5th stage final carbon filter
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x 205, 2nd stage carbon block filter (replace every 12 months)
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x WH-250, Whole House Water Treatment Sediment Carbon Filter Syste
1 x WS-150M, Whole House Water Softener
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
2 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
1 x 316UP, Upgrade for CTA20 gal/day (includes US Membrane filter)
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 706, Membrane Filter Casing Housing Assembly
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x Special Filter Kit Koolermax dealer distribution kit
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker

View Cart$5,127.85

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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