Check that the main water shutoff valve is fully open
Check that the water meter valve is fully open
Inspect the pressure-reducing valve and adjust or replace it if needed
Clean or replace clogged faucet aerators and showerheads
Replace corroded or clogged old pipes
Check for leaks in pipes, fixtures, and toilets
Test the water pressure with a gauge
Contact your water utility if the incoming pressure is low
Install a booster pump if needed
Install a larger diameter supply line if the plumbing is undersized
Flush the water heater to remove sediment
Replace faulty shutoff valves that are restricting flow
Make sure multiple fixtures are not being used at the same time
Upgrade to modern low-restriction fixtures and fittings