relief valve on elec water heater Home › Forums › Public Forums › General Plumbing › relief valve on elec water heater This topic has 1 reply, 2 voices, and was last updated 23 years, 11 months ago by Harold Kestenholz. Viewing 1 reply thread Author Posts 9 Feb 2001 at 11:17 pm #274604 MasterPlumbersKeymaster i have a 17 gallon reliance water heater. i came home recently and my house was filled with steam as all the water was gushing out of the relief valve. is this a problem with the thermostst, heating element or relief valve? 10 Feb 2001 at 6:33 am #290026 Harold KestenholzParticipant Seems like a thermostat or thermostat wiring problem. Get it checked immediately. Author Posts Viewing 1 reply thread You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In