Log In Log In  |  Checkout   |  87 item(s)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x KT-103, Optional Manual Membrane Flush Valve
3 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 773, AC Booster Pump Assembly Large 150-200GPD RO systems SET
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x *Discontinued* RD102
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x *Discontinued* RD150
2 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x 335, 3rd stage TFC 35/45 US membrane filter (every 2-3 yrs)
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
4 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x FM-8100TG44, DigiFlow Digital Water Flow Rate Meter
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 205, 2nd stage carbon block filter (replace every 12 months)
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
2 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
3 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
2 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x DM-1, Inline Dual TDS monitor (meter) for RO DI System DM1
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x TMR-220V-1A Aquatec TACS234-19 Transformer Power Supply EuroPlug
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x Bundle Filter KPAK-104m Sediment Carbon Block DI Resin Membrane
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x CDP6800, AQUATEC CDP6800 Booster Pump Only 6840-2J03-B224
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x AQUATEC 8852-2J03-B424 High Flow Booster Pump 110V Transformer
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)

View Cart$6,828.84
Specials Log InCreate Account Checkout  Shopping Cart87 item(s)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x KT-103, Optional Manual Membrane Flush Valve
3 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 773, AC Booster Pump Assembly Large 150-200GPD RO systems SET
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x *Discontinued* RD102
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x *Discontinued* RD150
2 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x 335, 3rd stage TFC 35/45 US membrane filter (every 2-3 yrs)
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
4 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x FM-8100TG44, DigiFlow Digital Water Flow Rate Meter
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 205, 2nd stage carbon block filter (replace every 12 months)
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
2 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
3 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
2 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x DM-1, Inline Dual TDS monitor (meter) for RO DI System DM1
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x TMR-220V-1A Aquatec TACS234-19 Transformer Power Supply EuroPlug
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x Bundle Filter KPAK-104m Sediment Carbon Block DI Resin Membrane
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x CDP6800, AQUATEC CDP6800 Booster Pump Only 6840-2J03-B224
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x AQUATEC 8852-2J03-B424 High Flow Booster Pump 110V Transformer
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)

View Cart$6,828.84

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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