Log In Log In  |  Checkout   |  26 item(s)
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x 5th Stage pn215 Refillable inline DI filter (color change)
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x CP-KOR45, O RING FOR KOOLERMAX BOTTOM FILTER HOUSING CASING
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)

View Cart$694.40
Specials Log InCreate Account Checkout  Shopping Cart26 item(s)
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x 5th Stage pn215 Refillable inline DI filter (color change)
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x CP-KOR45, O RING FOR KOOLERMAX BOTTOM FILTER HOUSING CASING
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)

View Cart$694.40

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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