The house is 2 stories built in 1935. It has a finished basement with a 40 gallon water heater inside the basement. I see copper plumbing connected to
the water heater…I cant see if the total water supply plumbing has been upgraded to copper.
All the inside faucets have average/serviceable water pressure. ( kitchen sink,and two baths ). The issue…is when one or more faucets are turned on
at the same time. Then one siphon’s or takes away from the other. ( At an
above average rate ).
What could be the problem? The water pressure coming to he house from the
street is 60psi.