Log In Log In  |  Checkout   |  102 item(s)
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x TMR-220V-1A Aquatec TACS234-19 Transformer Power Supply EuroPlug
1 x 671C, Replacement UV Lamp Light for 609C (16 Watt)
4 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
2 x SC207, Specialty Filter Refillable Color Changing DI Filter for
2 x 752, DC Booster Pump w/ Transformer
1 x bulksf05, Koolermax Sediment Filter
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
2 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
3 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x KT-103, Optional Manual Membrane Flush Valve
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 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x 720, Feed Water Adapter with Needle Valve
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x 3/4" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
3 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x FRQ300, Flow Restrictor 300ML / min
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x FM-8000T, DigiFlow Digital Water Flow Meter Rate Count Down
1 x 578, TDS Water Quality Meter tds-3
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
2 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x FM10, STEEL BRACKET SINGLE HOUSING MOUNTING SYSTEM
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x SET8855-300 Aquatec 5853 Booster Pump Assembly for 300GPD RO Sys
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x Panel 3/4" 6710M-66TM Digital Flow Meter count up GPM 115V
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x 326, 3rd stage TFC 24 /26 US membrane filter (replace 2-3 yrs)
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
2 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR104H

View Cart$4,127.34
Specials Log InCreate Account Checkout  Shopping Cart102 item(s)
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x TMR-220V-1A Aquatec TACS234-19 Transformer Power Supply EuroPlug
1 x 671C, Replacement UV Lamp Light for 609C (16 Watt)
4 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
2 x SC207, Specialty Filter Refillable Color Changing DI Filter for
2 x 752, DC Booster Pump w/ Transformer
1 x bulksf05, Koolermax Sediment Filter
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
2 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
3 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x KT-103, Optional Manual Membrane Flush Valve
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 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x 720, Feed Water Adapter with Needle Valve
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x 3/4" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
3 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x FRQ300, Flow Restrictor 300ML / min
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x FM-8000T, DigiFlow Digital Water Flow Meter Rate Count Down
1 x 578, TDS Water Quality Meter tds-3
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
2 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x FM10, STEEL BRACKET SINGLE HOUSING MOUNTING SYSTEM
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x SET8855-300 Aquatec 5853 Booster Pump Assembly for 300GPD RO Sys
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x Panel 3/4" 6710M-66TM Digital Flow Meter count up GPM 115V
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x 326, 3rd stage TFC 24 /26 US membrane filter (replace 2-3 yrs)
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
2 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR104H

View Cart$4,127.34

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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