What is Causing Low Water Pressure in My Home?

Few things are more frustrating than jumping into the shower after a long day in the Las Vegas sun only to be met with a weak trickle coming from the shower head. When the water flow in your house drops, it makes everything from doing dishes in the kitchen sink to running the washing machine that much more of a chore.

Low water pressure in home systems is a common issue, but finding the root cause requires some detective work. At Dr. Cool, we want to be your partner for troubleshooting these water pressure problems. This guide will help you identify the common causes and find the right remedies to get the water moving again.

Before you assume there is a major problem with your water main line, check these three simple things. These are often the most overlooked causes of low water pressure.

1. The Main Shut-off Valve: Ensure it is fully open. If you recently had a repair or plumbing service, someone may have partially closed valves and forgotten to turn them back all the way.
2. The Water Meter Valve: This is the valve handled by the water company. If it is even slightly closed, your whole house will experience a drop in psi.
3. The Water Supplier: Check with your water supplier or water company. Sometimes municipal water supply maintenance or the use of a nearby fire hydrant can cause a temporary drop in water flow.

Most Las Vegas homes have a pressure-reducing valve (PRV). This device is a bell-shaped valve that regulates the pounds per square inch of water entering your home from the water main. It ensures the pressure does not get high enough to cause water damage to your plumbing fixtures.

If your PRV fails, you might notice a sudden drop in your home’s water pressure or, conversely, a dangerous spike. You can check this by attaching a pressure gauge to an outside spigot. If the reading is consistently below 40 psi, your PRV likely needs adjustment or replacement. Readings above 80 psi indicate the PRV may be failing in the other direction, which can damage pipes and plumbing fixtures.

Las Vegas is famous for its hard water. Over time, mineral buildup and calcium can accumulate inside your water system. This buildup acts like cholesterol in an artery, narrowing the path for the water supply.

• Aerators and Showerheads: If the low water pressure is only happening at one faucet, the problem is likely a clogged aerator. Unscrew the aerator or showerhead, then soak it in vinegar to dissolve the mineral buildup.
• Water Heaters: If you only notice low pressure when using hot water, the issue may be sediment buildup inside your water heater. Flushing the tank can often restore water flow.

The Remedy: Installing a water softener can prevent this common issue from returning by removing the minerals before they can corrode or clog your pipes.

If your home was built several decades ago, you might have galvanized steel pipes. These pipes are notorious for internal corrosion. As they corrode, they develop internal blockages that severely restrict the water flow.

Unfortunately, there is no DIY fix for corroded pipes. Once the corrosion takes over, the clogged pipes will eventually need to be replaced. A licensed plumber can inspect your water line to see if a partial or full repipe is necessary to save your home’s plumbing system.

Sometimes, low water pressure is caused by water escaping before it ever reaches your faucet. Hidden leaks in your supply line or under your foundation can steal your pressure and lead to massive water bills.

Troubleshooting for Leaks:

1. Turn off all water inside and outside the house.
2. Check your water meter. On digital meters, look for a small triangle or drop symbol that spins or blinks when water is moving. Your water utility's website can show you how to read your specific meter model.
3. If the dial is still moving, you have leaky pipes somewhere in your water system.

If you suspect leaky pipes or notice damp spots in your yard near the water line, call a pro immediately to prevent water damage.

While cleaning a showerhead or opening a shutoff valve is a simple DIY task, many causes of low water pressure require the know-how of a professional. If you have checked the basics and your water is still a trickle, it is time to bring in the experts.

At Dr. Cool, our licensed team uses the latest pressure gauge technology and diagnostic tools to find exactly where your plumbing system is failing. We explain your options clearly and keep the process stress-free with up-front pricing so your water can get back to flowing and you can get back to your day.

Tired of low water pressure? Call Dr. Cool at (702) 608-6939 or schedule your professional plumbing diagnostic online today.