If you shut the valves on that bathtub OFF, then can you get water out of
any of the other faucets in the house?
If you can't, then you must have a poltergeist in your house, call Ghost
Busters, 'cause I'm out of ideas..
If you can, then it's because the bathtub spout is the lowest water
outlet in the house, and the outside valve is choking off the flow so
much that opening the bathtub valves reduces the pressure to the point
where water won't rise to the level of the higher outlets.
Anyway, if there's no other valves in the main line you can shut you
1. Fix the tub valves while that little bit of water is running if you
can. You might want to shut off the hot water heater so the water isn't
hot, or maybe there's a shutoff valve in the heater's supply line you
could shut off.
2. Have the city Water Department come and shut the water off via their
underground valve, then fix that shutoff valve (it probably needs new
seals) and have them turn the water back on again.
3. See if you can rent a pipe freezing rig like one of these:
4. Give up and call in a professional.
Happy New Year,
Jeff Wisnia (W1BSV + Brass Rat '57 EE)
"If you can smile when things are going wrong, you've thought of someone
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