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1 x Parts, Ro Water System Installation Parts Bag 1/4"
2 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x TMR-AQT-2A, Transformer Power Supply Aquatec TACS114-48 for 8800
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
2 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x CP-KOR45, O RING FOR KOOLERMAX BOTTOM FILTER HOUSING CASING
1 x *Discontinued* RO585A
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x HK120-PUMP KoolerMax Aeroponics Hydroponics System Booster Pump
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x Optional: 564 Membrane Filter Housing Wrench Opener

View Cart$2,405.95
Specials Log InCreate Account Checkout  Shopping Cart49 item(s)
1 x Parts, Ro Water System Installation Parts Bag 1/4"
2 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x TMR-AQT-2A, Transformer Power Supply Aquatec TACS114-48 for 8800
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
2 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x CP-KOR45, O RING FOR KOOLERMAX BOTTOM FILTER HOUSING CASING
1 x *Discontinued* RO585A
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x HK120-PUMP KoolerMax Aeroponics Hydroponics System Booster Pump
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x Optional: 564 Membrane Filter Housing Wrench Opener

View Cart$2,405.95

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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