Log In Log In  |  Checkout   |  43 item(s)
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x AQF-600-105, Flow Meter Panel Mount 1/2" MPT
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x 1/2" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x 568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
1 x 316, 2nd stage CTA 16 US Membrane filter
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
2 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x *Discontinued* RO585NTF
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x Panel 1/4 Digital Flow Meter count up total Gallons GPM 56"cable
1 x 565, Digital Pressure Gauge Tester Monitor
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x FM214G 1/4" NPT Digital Flow Meter count up total Water Gallons
1 x PH80, Digital pH Meter Hydrotester Calibration Storage Solutions
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x *Discontinued* RD102
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x *Discontinued* RO585

View Cart$2,137.25
Specials Log InCreate Account Checkout  Shopping Cart43 item(s)
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x AQF-600-105, Flow Meter Panel Mount 1/2" MPT
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x 1/2" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x 568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
1 x 316, 2nd stage CTA 16 US Membrane filter
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
2 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x *Discontinued* RO585NTF
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x Panel 1/4 Digital Flow Meter count up total Gallons GPM 56"cable
1 x 565, Digital Pressure Gauge Tester Monitor
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x FM214G 1/4" NPT Digital Flow Meter count up total Water Gallons
1 x PH80, Digital pH Meter Hydrotester Calibration Storage Solutions
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x *Discontinued* RD102
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x *Discontinued* RO585

View Cart$2,137.25

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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