But if you’ve already replaced them or have a newer house with new pipes, try the obvious first. Make sure the shutoff valves near the water meter are fully open. Sounds basic, but plumbers still have to charge for a service call to simply turn a water pressure valve handle! Then check the water pressure.Click to see full answer. Subsequently, one may also ask, how can I increase water pressure without a pump? How to increase water pressure without a pump Elevate the height of your water tank. Remove flow regulator on your shower head. Unclogging pipes. Repair leaks and cracked in pipes. Replacing pressure regulators or adjusting the pressure regulators. Increasing the diameter of pipes. Contact your local water company. Also Know, how do I adjust my water pressure? Position the jaws of the wrench over the top nut of the adjustment screw. Turn the screw in a clockwise direction to increase the water pressure and a counterclockwise direction to decrease water pressure. Make the adjustment one or two full revolutions at a time. Open a water faucet to test the pressure. Moreover, how do I increase mains water pressure? Pressure can be increased by incorporating a pump between cold or hot water tanks and the taps. If you have a mains-fed system such as combi-boiler you should have good pressure. An increase in pressure by pumping should cause no problems as it cannot slip off taps like push-on mixer showers.What causes low water pressure in a home? Debris and mineral buildup in pipes. Debris — such as sand, dirt, and pollutants — can enter your home’s pipes when a water main fractures. Corrosion buildup inside piping. Plumbing leaks. Municipal water supply malfunctions.