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1 x 773, AC Booster Pump Assembly Large 150-200GPD RO systems SET
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Dispense
2 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x 578, TDS Water Quality Meter tds-3
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
2 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x *Discontinued* RD102
1 x KF612, Elite Series: Oil Rubbed Bronze ORB Drinking Water Faucet
2 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
2 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
2 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
2 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x CDP6800, AQUATEC CDP6800 Booster Pump Only 6840-2J03-B224
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x 752, DC Booster Pump w/ Transformer
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
3 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
3 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x bulksf05, Koolermax Sediment Filter
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 201, 1st stage sediment filter (replace every 6-12 months)
2 x CKV0402, Blue color Elbow Check Valve Elbow Type
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x DI210, Heavy-duty DI system for Aquarium and Reef
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x bulkic21, Koolermax Inline Carbon Filter
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x SET8855 Aquatec 5853 Booster Pump Assembly for Aeroponics System
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
2 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x N-14-1M, Nipple Fitting connector between standard RO housing
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
2 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x 741-14, Diverter Valve for Countertop Water Units
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 706, Membrane Filter Casing Housing Assembly
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x TMR-UV-6W, Replacement UV Ballast Transformer 6 Watts for 602 UV
1 x 723, Feed Water Adapter with Ball Valve
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x TMR-AQT-2A, Transformer Power Supply Aquatec TACS114-48 for 8800
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x Special, Single Stage Housing Bracket Shell Connection Kit
2 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x IM60, Ice Maker or RV Water Filter, Inline Typle
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x 671C, Replacement UV Lamp Light for 609C (16 Watt)
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x .RD322 Aquarium 260-300 GPD REVERSE OSMOSIS RO+DI WATER SYSTEM
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x bulk201, Sediment Filter
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x bulk205, Carbon Block Filter
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 565, Digital Pressure Gauge Tester Monitor
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x bulk818, DI resin refill bags Di-Ionization media
1 x KT-103, Optional Manual Membrane Flush Valve

View Cart$8,894.20
Specials Log InCreate Account Checkout  Shopping Cart119 item(s)
1 x 773, AC Booster Pump Assembly Large 150-200GPD RO systems SET
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Dispense
2 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x 578, TDS Water Quality Meter tds-3
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
2 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x *Discontinued* RD102
1 x KF612, Elite Series: Oil Rubbed Bronze ORB Drinking Water Faucet
2 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
2 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
2 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
2 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x CDP6800, AQUATEC CDP6800 Booster Pump Only 6840-2J03-B224
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x 752, DC Booster Pump w/ Transformer
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
3 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
3 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x bulksf05, Koolermax Sediment Filter
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 201, 1st stage sediment filter (replace every 6-12 months)
2 x CKV0402, Blue color Elbow Check Valve Elbow Type
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x DI210, Heavy-duty DI system for Aquarium and Reef
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x bulkic21, Koolermax Inline Carbon Filter
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x SET8855 Aquatec 5853 Booster Pump Assembly for Aeroponics System
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
2 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x N-14-1M, Nipple Fitting connector between standard RO housing
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
2 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x 741-14, Diverter Valve for Countertop Water Units
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 706, Membrane Filter Casing Housing Assembly
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x TMR-UV-6W, Replacement UV Ballast Transformer 6 Watts for 602 UV
1 x 723, Feed Water Adapter with Ball Valve
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x TMR-AQT-2A, Transformer Power Supply Aquatec TACS114-48 for 8800
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x Special, Single Stage Housing Bracket Shell Connection Kit
2 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x IM60, Ice Maker or RV Water Filter, Inline Typle
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x 671C, Replacement UV Lamp Light for 609C (16 Watt)
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x .RD322 Aquarium 260-300 GPD REVERSE OSMOSIS RO+DI WATER SYSTEM
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x bulk201, Sediment Filter
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x bulk205, Carbon Block Filter
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 565, Digital Pressure Gauge Tester Monitor
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x bulk818, DI resin refill bags Di-Ionization media
1 x KT-103, Optional Manual Membrane Flush Valve

View Cart$8,894.20

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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