Log In Log In  |  Checkout   |  115 item(s)
1 x bulk201, Sediment Filter
1 x 578, TDS Water Quality Meter tds-3
3 x 205, 3rd stage solid carbon block filter (replace every 12month)
5 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
2 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
1 x 5th Stage pn215 Refillable inline DI filter (color change)
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
4 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
2 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
1 x *Discontinued* RD102
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
3 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
3 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
2 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x Aeroponics HighPressure Booster Pump Aquatec CDP5853 Transformer
1 x KF310, Elite Series: Polish Chrome Drinking Water Faucet
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x KT-103, Optional Manual Membrane Flush Valve
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x 6th Stage pn215 Refillable inline DI filter (color change)
2 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
2 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 205, 5th stage final carbon filter
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
2 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x Micro 1/4 NPT Digital Flow Meter count up total Water Liter LPM
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
2 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x .SW-1C COUNTERTOP WATER FILTER SYSTEM (CLEAR HOUSING)
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x N-14-1M, Nipple Fitting connector between standard RO housing
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x 706, Membrane Filter Casing Housing Assembly
1 x *Discontinued* RO585
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x 752, DC Booster Pump w/ Transformer
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x FRQ550, Flow Restrictor 500 to 600ML / min
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x *Discontinued* RD106
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x *Discontinued* RO6ALK
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x WS-150M, Whole House Water Softener

View Cart$7,811.03
Specials Log InCreate Account Checkout  Shopping Cart115 item(s)
1 x bulk201, Sediment Filter
1 x 578, TDS Water Quality Meter tds-3
3 x 205, 3rd stage solid carbon block filter (replace every 12month)
5 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
2 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
1 x 5th Stage pn215 Refillable inline DI filter (color change)
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
4 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
2 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
1 x *Discontinued* RD102
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
3 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
3 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
2 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x Aeroponics HighPressure Booster Pump Aquatec CDP5853 Transformer
1 x KF310, Elite Series: Polish Chrome Drinking Water Faucet
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x KT-103, Optional Manual Membrane Flush Valve
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x 6th Stage pn215 Refillable inline DI filter (color change)
2 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
2 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 205, 5th stage final carbon filter
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
2 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x Micro 1/4 NPT Digital Flow Meter count up total Water Liter LPM
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
2 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x .SW-1C COUNTERTOP WATER FILTER SYSTEM (CLEAR HOUSING)
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x N-14-1M, Nipple Fitting connector between standard RO housing
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x 706, Membrane Filter Casing Housing Assembly
1 x *Discontinued* RO585
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x 752, DC Booster Pump w/ Transformer
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x FRQ550, Flow Restrictor 500 to 600ML / min
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x *Discontinued* RD106
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x *Discontinued* RO6ALK
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x WS-150M, Whole House Water Softener

View Cart$7,811.03

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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