Expansion Tank

Amtrol ST-42V

Expansion Tank Therm-X-Trol Thermal 20 Gallon 150PSIG 3/4" NPTF ST-42V Non-ASME for Closed Potable Water Systems to Control Pressure Build-up

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Product Overview

Amtrol invented the thermal expansion tank to absorb expanded water in closed, hot water systems and protect the water heater. Since the beginning, we've kept the pressure on our competitors with features they just can't match
like our patented Turbulator, antimicrobial liner, patent-pending InSight service indicator cap and 50 PSIG precharge. When your water heater is on the line, we deliver.

  • Antimicrobial liner neutralizes bacteria on contact
  • Patented Turbulator water circulation device
  • InSight indicator cap tank service alert
  • Strongest tank design featuring deep drawn steel and multi-dome construction
  • Thickest diaphragm - heavy duty butyl
  • Projection welded air stem to help eliminate leaks
  • Exclusive ST-1 for tankless water heaters

Product Details

Product TypeThermal
Tank Capacity20GAL
Inlet/Outlet Connection3/4IN NPTF
Part NumberST-42V
Precharge Pressure40PSIG
Temperature200DEG F
Diaphragm MaterialHeavy Duty Butyl
ApplicationClosed, Potable Water Systems to Control Pressure Build-up
California ResidentsWARNING: Click here for Proposition 65 information.

Commonly Purchased with This Item     
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