Log In Log In  |  Checkout   |  76 item(s)
3 x Parts, Ro Water System Installation Parts Bag 1/4"
4 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
3 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
4 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
2 x 1st stage SF05 sediment filter (replace every 6-12 months)
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x 201, 1st stage sediment filter (replace every 6-12 months)
2 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
2 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x EMT-10, Empty Filter Cartridge Casing Housing
2 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x Special Filter Kit Koolermax dealer distribution kit
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
2 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x AQF-600-105, Flow Meter Panel Mount 1/2" MPT
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
2 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
2 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)

View Cart$2,397.95
Specials Log InCreate Account Checkout  Shopping Cart76 item(s)
3 x Parts, Ro Water System Installation Parts Bag 1/4"
4 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
3 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
4 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
2 x 1st stage SF05 sediment filter (replace every 6-12 months)
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x 201, 1st stage sediment filter (replace every 6-12 months)
2 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
2 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x EMT-10, Empty Filter Cartridge Casing Housing
2 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x Special Filter Kit Koolermax dealer distribution kit
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
2 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x AQF-600-105, Flow Meter Panel Mount 1/2" MPT
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
2 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
2 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)

View Cart$2,397.95

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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