What Is a Boiler or Unfired Pressure Vessel?
We do not inspect or regulate residential hot water heaters or boilers for heating private residences. You will typically need a permit from your city or county to install or replace a residential water heater or boiler. Some other common pressure vessels we do not regulate are
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10 Best RV Heaters Reviewed & Rated in 2021 (Electric
The Temperature in Your Boiler and the Dangers of
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WAC 296-104-010
:"Low pressure boiler" shall mean a steam boiler operating at a pressure not exceeding 15 psig or a boiler in which water is heated and intended for operation at pressures not exceeding 160 psig or temperatures not exceeding 250 degrees F by the direct application of energy from the combustion of fuels or from electricity, solar or nuclear energy. Low pressure boilers open to atmosphere and
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