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Hey there.
So we have an old home (1902) that is 3 stories.
We currently have a tenant in our ground floor apartment. She just informed me that she is unable to get the hot water to come out of the bathroom sink tap.
She could let it run and run and it will not get hot at the sink tap.
Her kitchen sink tap works fine.
Our kitchen sink tap works fine.
Our 3rd floor bathroom sink gets hot pretty quickly but
our 2nd floor bathroom sink tap has the same problem that out tenant does...
Our 2nd floor bathroom sink hot water has NEVER gotten hot (unless I take a shower in there beforehand) and we've just learned to live with it, since our primary bathroom is on the 3rd floor...
Anyway, this is a new problem ( we think) for our ground floor bathroom sink as our previous two tenants never mentioned it.
We have a tank (blech) water heater 80 gal on the ground level of the house, so her bathroom is actually the closest to the source of hot water.
We can't figure this out.
Any ideas oh plumbing gifted folks out there? Thanks!
Valve off your water heater. Open the hot water taps in question and a hot water tap on the top floor. If you have continuous flow at any of those points, someone has cross connected your pipes(or your water heater isolation valve could be leaking through). Expect some flow from residual water in the lines- a few minutes should allow the upstairs pipes to drain, but not continuous.
If the original iron pipes are still in service, they are probably so rusted inside that you aren't getting enough flow through them. In your 2nd floor bathroom sink, without taking a shower beforehand: Never? Ever? How long did you wait before pronouncing it Never?