I just put an addition on my house and added a second (instant on) hot water tank. The addition was all plumbed with PEX. The original part of the house is plumbed with 1/2 copper. When I did the plumbing, I switched the incoming 1/2 copper supply to 3/4 PEX which supplies the all PEX addition and a second manabloc which ties into the original 1/2 copper, so I could replace the copper one run at a time. It has been about a month since all of this was completed, and now there is a bad (metallic) taste in the water at the addition faucets and not at the original faucets. If I run the water for awhile, this taste goes away but it just doesn’t make any sense to me. Any ideas?
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I had a similar problem after adding a new bathroom with pex vs the copper in the rest of the house. In the end it turned out to be the faucets I was using. I tried a replacement faucet from the same no-name manufacturer and got the same problem. Switch to a name-brand faucet and no more bad taste.
To figure out the problem was with the faucets I had took water from the new tap, old taps in another part of the house and directly from the supply line for the new tap. A blind taste test confirmed the bad taste was only in the new taps.
cheers - mark
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Mark's Woodworking
One of the faucets in question was installed in my old kitchen with no problems after 4 years in service.
was pipe dope used anywhere?
All teflon tape.
Lot's of assembly chemicals that leave varied tastes on new & added systems.
I plumb highrise residential buildings & we try to flush systems with chlorine before turning over to the owners.
Slightly difficult for the average DIY'er but not impossible.
PEX or HY-PEX?
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Sorry, I don't know the difference. I got some from a plumber and some from Lowes. The 1/2 that goes to the original house says PEX, the rest has no markings on it that I can see.
There is a PEX that is formulated for potable water, different from that for heat.
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