We have a relatively nice house (ie not terribly cheaply built, 25 yrs old), but we have a strange problem that has become bad lately. It is either low water pressure or low water flow. Some facts
- If I am taking a shower and someone turns on some water faucet, even not too much, the flow drops dramatically
- It applies to both hot and cold water
- Flow of water in the basement bathroom sink used to be pretty good, not it is not
- We have a defunct "water softener" system that is still in line but not operating for several years.
- it just feels that there "is not as much" water than before
- I checked the main valves near the water meter, they are quite wide open (I was hoping that perhaps the problem is that they are just "cracked open", but not such luck).
I have some nice stuff such as a "Magnehelic water pressure gauge" that goes up to 30 psi. Would it be suitable to use? I could mount it permanently somewhere in the furnace room.
I am thinking, if I record pressure, low pressure when all faucets are closed means a city water problem. If not, low pressure when one faucet is open means a house problem. Is that right?
What is the rational approach to solving this problem?