Expansion Tank

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flyinghigh Power-User Join Date: May 2008 Location: Arizona Posts: 355 Good Answers: 4	Expansion Tank 09/18/2009 10:53 AM
	I doubt if an expansion tank is required for a Point Of Use electric H2O heater. Anyone know for sure? This is for a single 4 gal, 120v, 1500w POU H2O heater serving 2 restrooms. Thx.
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techno Guru Join Date: Jan 2007 Location: Canada Posts: 1024 Good Answers: 40	#1 Re: Expansion Tank 09/18/2009 3:23 PM
	The purpose of an expansion tank is to equalize pressure in a closed system. I see no reason to have an expansion tank on an open system such as a point of use heater __________________ Perfection is a subjective and abstract concept.
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Tim in Mexico Guru Join Date: Jul 2008 Location: Anywhere I may be at the time Posts: 661 Good Answers: 16	#2 Re: Expansion Tank 09/19/2009 4:21 AM
	Definitely NOT required, your point of use heater needs to be as close as possible to the actual point of use. Otherwise you have excessive piping that needs to be heated every time you open your hot water valve. Will this be possible while serving two restrooms with one unit?
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ronseto Guru Join Date: Sep 2008 Location: Vancleave, Ms about 30 miles inland from Biloxi and the coast Posts: 3197 Good Answers: 106	#3 Re: Expansion Tank 09/19/2009 12:03 PM
	You need to know how long it takes for the temperature to recover. If the two restrooms have a lot of traffic, you could quickly run out of hot water. For low use, no problem. Might I suggest instead, installing an instant on-demand water heater. They are more economical to operate and can be sized to meet all your needs. __________________ Mr.Ron from South Ms.
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#4 Re: Expansion Tank 09/21/2009 11:09 AM
	The manufacturer's information leaflet supplied with the equipment and the local plumbing codes have all the answers on this one. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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PWSlack (1); ronseto (1); techno (1); Tim in Mexico (1)

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