Single/double throw water heater t-stat..

02-14-2012, 04:41 PM	#1
Bulldoggish Newbie   Join Date: Jun 2011 Location: Central AZ Posts: 13	Single/double throw water heater t-stat.. Hey everyone, What's the difference in function between a single and double throw water heater t-stats? Thanx

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02-14-2012, 11:01 PM	#2
plummen retired elect/hvac/plumb     Join Date: Jan 2010 Location: south east of omaha Posts: 2,391	Single/double throw water heater t-stat.. Well in my mind a single throw switch is basically on or off,a double throw could be on or off either direction like a 3 way light switch. I guess Ive just never thought of it in terms of a thermostat for a water heater __________________ "facts" have no relevance to this discusion To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Posting from a concrete bunker under a non descript barn

02-14-2012, 11:11 PM	#3
DannyT Member   Join Date: Mar 2011 Location: Groveport, Ohio Posts: 1,580	Single/double throw water heater t-stat.. are are referring to the difference between the upper and lower thermostats? the upper one switches the power to the lower thermostat after the upper part of the tank reaches temperature. on a cold tank the upper heats first and when the thermostat shuts off the upper element the lower thermostat is energized.