Log In Log In  |  Checkout   |  102 item(s)
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
4 x 752, DC Booster Pump w/ Transformer
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x 799, Siphon Pump Drinking Water Liquid Fluid Oil Manual Trasfer
1 x *Discontinued* RD102
2 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x bulksf05, Koolermax Sediment Filter
1 x *Discontinued* RD150
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x KT-103, Optional Manual Membrane Flush Valve
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
2 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
3 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x *Discontinued* RD106
2 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x FM-8100TG44, DigiFlow Digital Water Flow Rate Meter
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x 718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x Aeroponics HighPressure Booster Pump Aquatec CDP5853 Transformer
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x N-14-1M, Nipple Fitting connector between standard RO housing
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x PH80, Digital pH Meter Hydrotester Calibration Storage Solutions
1 x DI210, Heavy-duty DI system for Aquarium and Reef
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x FM-6710M-88 1" Digital Flow Meter count up Total GPM 56" cable
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x DM-1, Inline Dual TDS monitor (meter) for RO DI System DM1
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x 3/4" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x IM60, Ice Maker or RV Water Filter, Inline Typle
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x bulk213, Inline Carbon Filter
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G

View Cart$5,287.84
Specials Log InCreate Account Checkout  Shopping Cart102 item(s)
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
4 x 752, DC Booster Pump w/ Transformer
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x 799, Siphon Pump Drinking Water Liquid Fluid Oil Manual Trasfer
1 x *Discontinued* RD102
2 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x bulksf05, Koolermax Sediment Filter
1 x *Discontinued* RD150
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x KT-103, Optional Manual Membrane Flush Valve
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
2 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
3 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x *Discontinued* RD106
2 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x FM-8100TG44, DigiFlow Digital Water Flow Rate Meter
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x 718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x Aeroponics HighPressure Booster Pump Aquatec CDP5853 Transformer
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x N-14-1M, Nipple Fitting connector between standard RO housing
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x PH80, Digital pH Meter Hydrotester Calibration Storage Solutions
1 x DI210, Heavy-duty DI system for Aquarium and Reef
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x FM-6710M-88 1" Digital Flow Meter count up Total GPM 56" cable
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x DM-1, Inline Dual TDS monitor (meter) for RO DI System DM1
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x 3/4" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x IM60, Ice Maker or RV Water Filter, Inline Typle
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x bulk213, Inline Carbon Filter
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G

View Cart$5,287.84

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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