Log In Log In  |  Checkout   |  43 item(s)
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
1 x WS-150M, Whole House Water Softener
1 x KF320, Elite Series: Brushed Nickel / Stainless Steel Faucet
1 x 723, Feed Water Adapter with Ball Valve
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 5th Stage pn215 Refillable inline DI filter (color change)
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 720, Feed Water Adapter with Needle Valve
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x .SW-1C COUNTERTOP WATER FILTER SYSTEM (CLEAR HOUSING)
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x 326, 3rd stage TFC 24 /26 US membrane filter (replace 2-3 yrs)
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
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 Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x FRQ200, Flow Restrictor 200ML / min
1 x FRQ850, Flow Restrictor 850ML / min
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting

View Cart$5,045.08
Specials Log InCreate Account Checkout  Shopping Cart43 item(s)
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
1 x WS-150M, Whole House Water Softener
1 x KF320, Elite Series: Brushed Nickel / Stainless Steel Faucet
1 x 723, Feed Water Adapter with Ball Valve
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 5th Stage pn215 Refillable inline DI filter (color change)
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 720, Feed Water Adapter with Needle Valve
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x .SW-1C COUNTERTOP WATER FILTER SYSTEM (CLEAR HOUSING)
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x 326, 3rd stage TFC 24 /26 US membrane filter (replace 2-3 yrs)
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
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 Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x FRQ200, Flow Restrictor 200ML / min
1 x FRQ850, Flow Restrictor 850ML / min
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting

View Cart$5,045.08

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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