Method of making a water heater and an improved water heater structure

摘要

A method of making a foamed-in-place insulated water heater is provided wherein isolation elements are positioned against a tank around the thermostats and spacer elements are positioned against the tank opposite the isolation elements. The water heater jacket is squeezed into an oval shape elongated to accommodate the passage of the jacket over the isolation elements and spacer elements and positioned around the tank and the squeeze released. The thermostats are protected when foam is then introduced into the annular space between the jacket and tank.