Hi there, new user.
I'm in a 7 story condo building in Brooklyn. We get a steady 70psi from the city, but pressure out of the booster pump can drop to under 30 in the mornings as everyone uses water.
Our pump is 1.5hp IIRC. The building was built in 2004. The builder was a bit of a schemer: he zoned it as some kind of a school, which allowed him to build 7 stories in an zone with a limit of 6 at the time.
So I am trying to figure out whether
- the pump needs to be refurbished, or
- whether we need a bigger pump on account of the floor discrepancy.
It might be possible the plumbers did their calculations based on 6 floors, and there have been complaints about pressure going back at least 5 years. So I'm not sure it's due to wear.
I've asked a few plumbers, they all gave me different and non specific answers. One guy came over, cleaned some gunk off rubber diaphrams and stuff (nothing was cut or damaged) and told me he'd research it further and get back to me. Never did.
So I am at a loss as to whether I should be asking a plumber, or a plumbing engineer, or a building engineer to figure out what the problem is. I understand one calculates the requirement based on floors, apartments, pipe size, etc. I'm not sure if a plumber does that, or some kind of an engineer.