Pressure problem

I have a water pressure problem with my home. The pressure is too low. A sprinkler I just bought rated to go 20-80 feet goes 5-30 feet. Fawcets are also low. I have a bell shaped pressure regulator on my pipes in the basement with a large screw on top. Should I attempt to increase the pressure slightly on my own? If so, how? Thanks!
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first throw a pressure gauge on the system to see what we're fealing with.what kind of pipe do you have? galv., copper, pex, cpvc....what?
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Is the pressure low all over the house, not just the sprinklers? You might want to have the local water co. check their equipment. Sometimes a screen on the inlet end of the meter clogs up or the impeller gear for the readout gets jammed, which can affect the pressure in whole house.
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