Log In Log In  |  Checkout   |  180 item(s)
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
3 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
5 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
4 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x 719, Drain Saddle Clamp / Valve
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
6 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
3 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
2 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x KF320, Elite Series: Brushed Nickel / Stainless Steel Faucet
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
2 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
2 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
3 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
2 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
4 x 1st stage SF05 sediment filter (replace every 6-12 months)
2 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x SET8855 Aquatec 5853 Booster Pump Assembly for Aeroponics System
1 x Parts, Ro Water System Installation Parts Bag 1/4"
2 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
2 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x UU Clips Pair Membrane to Filter, 2.5" to 2"
2 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
4 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
3 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x bulkic21, Koolermax Inline Carbon Filter
5 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
4 x 752, DC Booster Pump w/ Transformer
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
2 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 756SET, Aquatec Permeate Pump Reverse Osmosis System ERP1000
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
3 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
3 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
2 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
2 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x EMT-10, Empty Filter Cartridge Casing Housing
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x KT-103, Optional Manual Membrane Flush Valve
3 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
3 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x 723, Feed Water Adapter with Ball Valve
1 x bulk201, Sediment Filter
1 x DDP5800, Aquatec Demand Delivery Pump 5851-7E12 Increase Output
1 x bulk205, Carbon Block Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x bulkc10, Koolermax Carbon Block Filter
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x TMR-220V-1A Aquatec TACS234-19 Transformer Power Supply EuroPlug
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
2 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Dispense
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
2 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
1 x FRQ420, Flow Restrictor 420ML / min
1 x 718, Tubing 30 feet 1/4" white tube LLDPE PE for drinking water
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250

View Cart$7,684.22
Specials Log InCreate Account Checkout  Shopping Cart180 item(s)
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
3 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
5 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
4 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x 719, Drain Saddle Clamp / Valve
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
6 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
3 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
2 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x KF320, Elite Series: Brushed Nickel / Stainless Steel Faucet
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
2 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
2 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
3 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
2 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
4 x 1st stage SF05 sediment filter (replace every 6-12 months)
2 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x SET8855 Aquatec 5853 Booster Pump Assembly for Aeroponics System
1 x Parts, Ro Water System Installation Parts Bag 1/4"
2 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
2 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x UU Clips Pair Membrane to Filter, 2.5" to 2"
2 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
4 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
3 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x bulkic21, Koolermax Inline Carbon Filter
5 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
4 x 752, DC Booster Pump w/ Transformer
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
2 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 756SET, Aquatec Permeate Pump Reverse Osmosis System ERP1000
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
3 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
3 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
2 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
2 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x EMT-10, Empty Filter Cartridge Casing Housing
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x KT-103, Optional Manual Membrane Flush Valve
3 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
3 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x 723, Feed Water Adapter with Ball Valve
1 x bulk201, Sediment Filter
1 x DDP5800, Aquatec Demand Delivery Pump 5851-7E12 Increase Output
1 x bulk205, Carbon Block Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x bulkc10, Koolermax Carbon Block Filter
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x TMR-220V-1A Aquatec TACS234-19 Transformer Power Supply EuroPlug
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
2 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Dispense
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
2 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
1 x FRQ420, Flow Restrictor 420ML / min
1 x 718, Tubing 30 feet 1/4" white tube LLDPE PE for drinking water
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250

View Cart$7,684.22

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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