the water company - if you look on their website it should tell you what the minimum water pressure you should expect is. You can test this by timing how long it takes to fill a certain size bucket. This is only cold water. The hot water pressure will depend on your boiler and should not be reported to the water company.
There is more to this
Yes the water company states what the min pressure should be in some cases as low as 8 PSI but before you start doing the bucket measurement one has to know the size of their pipe as each diameter will give a different flow rate and also what material your water main is as many ferrous mains do have a severe build up of mineral deposits which also affects flow rates .
Also some mains do get "crushed" over the years if proper compacting is not used to insure the main is not bearing to much weight
We had the same problem. If you have low water pressure coming into your house this will affect the amount of water going into your ice maker.
House water pressure should be around 50-60 psi.
Increase the pressure to 40 PSI
its responsible to balance the environment
Standard meter will suffice, need to know pressure from meter to house. Size pipe appropriately for gas pressure coming into house X distance to water heater. Gas company or plumber should be able to help with this calculation.
If coming from a city main, it will usually be 1 inch. This will enter the house and go directly to a Pressure Reduction Valve ( PRV ) a bell shaped device where pressure is reduced to 70-80 psi. The pipe, now usually a 3/4 inch will continue to the house system.
All pipes in a house are connected, so when two outlets are turned on the water has to change from going in one direction to being divided and go two directions. However, the loss in water pressure should only be temporary . . . usually the system will re-adjust
Sounds like a bad/failed water pressure regulator.
how do i increase water pressure to the house if you have city water?
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.
== == Two possible problems............... The main shut off valve in the house is closed from the in-coming city water supply line, or the city supply line is shut off at the street .