$174.95
$174.95
Amtrol ST-30V (143N273) is a THERM-X-TROL Expansion Tank (Non-ASME) with 14 gallons volume and 150 PSI maximum working pressure.
With modern plumbing codes mandating backflow prevention, thermal expansion can cause pressure buildup in domestic water systems. Backflow preventer, pressure reducing valve or other one-way device causes expanded (heated) water to build pressure causing the relief valve to open resulting in wasted energy, shortened water heater life, wasted municipal water and sewer dollars, potential safety hazard.
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