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2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x PE Tubing Tube Cutter
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 578, TDS Water Quality Meter tds-3
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
2 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
2 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
2 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x FM214G, FM-6710M DigiFlow Digital Water Flow Meter Gauge Moniter
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x 799, Siphon Pump Drinking Water Liquid Fluid Oil Manual Trasfer

View Cart$1,527.34
Specials Log InCreate Account Checkout  Shopping Cart51 item(s)
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x PE Tubing Tube Cutter
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 578, TDS Water Quality Meter tds-3
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
2 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
2 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
2 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x FM214G, FM-6710M DigiFlow Digital Water Flow Meter Gauge Moniter
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x 799, Siphon Pump Drinking Water Liquid Fluid Oil Manual Trasfer

View Cart$1,527.34

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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