More info needed. -Are you on well, if so, say what kind of well, what pump, what pressure tank. We cannot diagnose with no information.
House water pressure should be around 50-60 psi.
Sounds like a bad/failed water pressure regulator.
how do i increase water pressure to the house if you have city water?
A mega-flow system is simply hot water stored under a certain pressure. The idea is to give one the same pressure throughout the house. This is a good choice of a boiler if one has high hot water demand.
There is usually a main water valve that comes into the house, locate this valve and turn it down. Installing a pressure reducing valve after water main valve will allow for adjustment of water pressure to proper setting.
Area water authority could have increased water main pressure, no or defective expansion tank in house main water line if house has a backflow preventer installed, or defective /not properly set pressure reducing valve.
If you are on a well it means you have a problem in the pressure tank. On city water means pressure in general is down, or your PRV is failing.
you do not have pressure from the source or the line from the source has broken
Install a pressure reducing valve
House pressure, 75 PSI maximum.
Yes, because the water you are recirculating is already past the pressure regulator.
It will be close to the inside wall where the water supply passes into the house from the line going towards the water meret.