Can I add a point of use hot water heater inline with a tank hot water heater?

by Water Heaters on June 30, 2010

Basically, my kitchen is the furthest sink away from my water heater. It takes forever for the water to get warm, and then another couple of moments to get really hot. I’m concerned that I’m not getting hot water to the dishwasher, unless I run the hot water at the sink first, but then for the rinse cycle, it has luke water again, instead of the hot water… I was thinking of putting in either a point of use instant hot water heater, or a 2-3 gallon tank heater, just to provide hot water, and figured if it was a tank, it would replinish alot quicker because of the hot water coming into it after it it depleted.. Any idea’s or pro’s/con’s anybody can think of? Anybody tried it before?


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{ 5 comments… read them below or add one }

Brian M June 30, 2010 at 10:05 am

your dishwasher does have an internal heater, I wouldn’t change anything other than what you are doing now. The hot water isn’t as important for the rinse cycle as it is for the wash cycle. Just run the water at the sink until it gets hot, then start the dishwasher. The rinse cycle will still work as it should regardless.

don n June 30, 2010 at 10:05 am

I can’t see where it would be any problem. Your regular hot water heater really doesn’t care what you do with the hot water after it leaves from it. The small point of use one wouldn’t create enough heat to bother the main heater back down the line. I am sure the point of use one has a pressure release valve in case a problem happens.

Just a thought. Most modern dishwashers have a sensor in them which will heat the water if it is hot hot enough. Does your dishwasher have this feature?

propreno June 30, 2010 at 10:05 am

You shouldn’t have a problem. Make sure you run the pressure relief line out of the house either through the wall or the floor (if you have a raised foundation). I’ve installed a few point of use water heaters as well as in-line circulating pumps which is another option.

Robert S June 30, 2010 at 10:05 am

I would check this out further. The in line might not work correctly with hot water coming into it. Hate to see you go threw all the expense, and have it not work correctly.

SeekingApproval June 30, 2010 at 10:05 am

who is going to run the water before the dishwasher cycle?
go ahead and put the inline unit under the sink. Brian doesn’t have customers that can pay for what they want.

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