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4 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
3 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
2 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
3 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
2 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x *Discontinued* RD150
3 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
1 x bulksf05, Koolermax Sediment Filter
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
2 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
2 x KT-103, Optional Manual Membrane Flush Valve
2 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 741-14, Diverter Valve for Countertop Water Units
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
2 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
1 x Micro 1/4 NPT Digital Flow Meter count up total Water Liter LPM
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x bulk213, Inline Carbon Filter
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x PE Tubing Tube Cutter
1 x UU Clips Pair Standard Filter to Standard Filter, 2" x 2"
1 x 719, Drain Saddle Clamp / Valve
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
2 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
1 x 720, Feed Water Adapter with Needle Valve
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System

View Cart$7,164.25
Specials Log InCreate Account Checkout  Shopping Cart91 item(s)
4 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
3 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
2 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
3 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
2 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x *Discontinued* RD150
3 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
1 x bulksf05, Koolermax Sediment Filter
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
2 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
2 x KT-103, Optional Manual Membrane Flush Valve
2 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 741-14, Diverter Valve for Countertop Water Units
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
2 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
1 x Micro 1/4 NPT Digital Flow Meter count up total Water Liter LPM
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x bulk213, Inline Carbon Filter
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x PE Tubing Tube Cutter
1 x UU Clips Pair Standard Filter to Standard Filter, 2" x 2"
1 x 719, Drain Saddle Clamp / Valve
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
2 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x Panel 1" Digiflow 6710M-88TM Digital Flow Meter count up GPM 115
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
1 x 720, Feed Water Adapter with Needle Valve
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System

View Cart$7,164.25

ASA, Stem Adapter NPT Thread [ASA]

$2.50

ASA, Stem Adapter NPT Thread



* ASA, Stem Adapter NPT Thread

* Please choose size from the selection box below. First number is tubing OD Outside Diameter and second number is NPT National Pipe Thread. (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 1/4" NPTF Thread ASA0404
* 1/4" Tube OD x 1/8" NPTF Thread ASA0402
* 3/8" Tube OD x 1/4" NPTF Thread ASA0604
* 3/8" Tube OD x 3/8" NPTF Thread ASA0606
* 1/2" Tube OD x 3/8" NPTF Thread ASA0706
* 1/2" Tube OD x 1/2" NPTF Thread ASA0707


* 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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