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Posted by Speedy Jim on January 3, 2007, 9:50 am
luv2cmwork@gmail.com wrote:
> Just replaced my water heater last night.
>
> I used to do some plumbing and have a general knowledge.
>
> On the old water heater, the cold water feed, was 1/2" copper, that
> narrowed down to 3/8" copper, before entering the 3/4 nipples into the
> water heater. The hot water coming out, was also 3/8" copper coming
> off the 3/4" nipple and fed a 1/2" hot water line.
>
> Undersized piping, I'm sure.
>
> I would like to someday, redo the plumbing in the house and take out
> some of that undersized piping. So, I hooked up the water heater with
> 3/4" from both the hot and cold, and plumbed into the 1/2" piping
> (planning for the future).
>
> This morning, while showering for the first time with the new water
> heater, the water temperature was very inconsistant and the water
> pressure seemed lower. The water would go from hot to cold and it was
> very hard to maintain a stead temperature. The water was hot...very
> hot, when turned to just hot.
>
> At first I thought maybe it was an anti-scald valve or something...that
> I had the water too hot. But I realized this was not an anti-scald
> valve. It was a regular oldtime shower valve.
>
> Would my taking that 3/8" pipe out and replacing with 3/4 cause these
> symtoms? Or could it be something with the new water heater?
>
> Thanks for your anticipated reply.
>
No, the 3/4" shouldn't matter. Certainly didn't lower the "pressure"
or flow.
You say the water is very hot now. It may simply be that the
'stat on the new heater is set higher or has a wider differential
than the old one. That high temp can make the shower control
difficult to adjust. Set the tank temp lower as an experiment.
Jim
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