If you feel that the water flow in your home is letting you down, there are some simple steps you can take to isolate and possibly alleviate the problem. For example, a blockage could be caused by mineral deposits on faucet nozzles, tub spouts and showerheads. By immersing the spout and/or aerator in a bucket of water and vinegar or other manufacturer recommended solution, you might easily free up the flow and volume of water.
Another problem that could impact overall pressure is a leak along your main supply. Detection tests can confirm a leak - even if it’s underground - but, if it’s on your property, you will be responsible for fixing it. Inside your home, examine your water supply for leaks. Even if you can’t see the full system, listen closely for hissing pipes, or watch for mould infestation - a sure sign of excessive moisture.
Finally, if your lines are a collection of various carriers joined together (eg. lead pipes to copper or copper to plastic), there is a possibility that you are losing pressure at those links - especially if older material is in use. Have a qualified plumber address those kinds of issues.