To determine if you need a pressure regulator, you can buy an inexpensive pressure gauge at your local hardware store. Screw it onto any hose bib or washing machine bib, and turn on the water.

Check water pressure with a gauge ($8 to $12) installed on an exterior faucet. Yes, the regulator is adjustable and you should try adjusting it before resorting to more expensive remedies, such as ...

Watts Regulator Watts Water Pressure Test Gauge. $14 at Amazon. $24 at Walmart $13 at Lowe's. Credit: Watts Regulator. Purchase a pressure gauge, which will run you about $10.