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Posted by HVAC on March 27, 2009, 11:48 am
> OK - in the boiler room, a gate valve on a 2 " cold water line
> had corroded totally off the stem, such that the gate dropped down by
> gravity, and was no longer connected to the riser stem.
> The initial rush of 'cold' water was the water standing in the
> HW line. On start-up, both sides of the main tempering valve were of
> course open. Then when hot water and no cold water were flowing, it
> tried to balance down until it shut the HW off completely.
> Fix - one 2" gate valve ( maybe $ 25 cost for the part ? If
> that much, whatever ), not 'tearing up the entire shower room' like
> the plumber had quoted at $ 12,000.
The plumber's idea was better.
Let's see...$25.00 or $12,000.00 ? Hmmmmm.
After the shower room was re-done, you come back
and (slaps forehead) find the broken valve.
Cha-Ching!
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> it.
> Technology chain: Americans invent it. Chinese steal the
> technology and mass produce it. Germans improve it. Sweedish
> buy a couple hundred thousand, to give to thier citizens
> "for free". Finally the Americans end up buying the Made in
> Pakistan version, cause it's about as cheap as the Walmart
> version.
> Don't thank me. It's my job. I'm a professional.