What causes low water pressure?

Ever turned on the faucet expecting a steady stream of water, only to watch it slowly dribble out? Taking a shower becomes frustrating, washing dishes takes twice as long, and even washing machines struggle to fill properly. If this sounds familiar, your Utah home may be experiencing low water pressure.

Low water pressure is one of the most common plumbing issues homeowners in the Ogden, Provo, and Salt Lake City areas deal with. The good news is that many low water pressure issues can be diagnosed and sometimes fixed with simple troubleshooting. In other cases, larger issues with the plumbing system or water supply may require assistance from a licensed plumber.

In this guide, we’ll explain what causes low water pressure, how to diagnose the issue in your house, and what steps you can take to restore proper water flow.

Overview of Low Water Pressure Problems

Before jumping into solutions, it helps to understand what low water pressure actually means and how it affects your water system.

What Is Low Water Pressure?

Water pressure is the force that pushes water through the pipes and out of faucets, showerheads, and other plumbing fixtures. It’s typically measured in pounds per square inch (PSI). In most homes, normal water pressure ranges from 40 to 80 PSI.

When pressure falls below that range, homeowners begin experiencing low water pressure. Faucets may produce low flow, appliances may fill slowly, and showers may feel weak.

Low pressure problems can affect one fixture, multiple fixtures, or the entire home, depending on the cause.

Common Symptoms Of Low Water Pressure

You may notice several signs if your home’s water pressure is not functioning correctly:

• Faucets that slowly dribble instead of running normally
• Weak flow from a shower head
• Appliances like washing machines taking longer to fill
• Reduced water flow when most fixtures are used at once
• A sudden drop in pressure when someone else uses water
• Difficulty rinsing soap while showering or washing dishes

These symptoms often indicate pressure problems somewhere in the entire system.

Water Flow vs. Water Pressure

People often confuse flow and pressure, but they are different.

• Water pressure is the force pushing water through the pipes.
• Water flow refers to the amount of water coming out of the faucet.

For example, mineral buildup inside pipes may restrict flow, reducing the flow rate even when the water supply pressure is normal.

Understanding this difference helps determine whether the problem lies in the plumbing fixtures, the water line, or the larger water system.

Common Causes Of Low Water Pressure

Several factors can cause low water pressure in a house. These typically fall into four categories:

• Problems with the water supply
• Issues within the plumbing system
• Faulty plumbing fixtures
• Problems with the main water line

Some issues affect the whole house, while others impact only certain areas.

For example:

• A partially closed valve may reduce pressure throughout the entire home.
• A clogged shower head may only affect that fixture.
• Corroded pipes may gradually reduce water flow throughout the house.

Identifying the scope of the problem is key to diagnosing water pressure problems.

Clogged Pipes And Corroded Pipes

Older plumbing systems are particularly vulnerable to clogged pipes and corroded pipes, both of which can dramatically reduce water pressure.

Mineral Buildup And Clogged Pipes

Utah is known for its hard water. Supplies derive from rivers passing through limestone and aquifers with high calcium and magnesium levels. These minerals accumulate inside water pipes over time, creating blockages that gradually reduce water flow.

Eventually, clogged pipes may narrow to the point that they significantly reduce flow and pressure. You may notice that water from faucets slows to a low flow or becomes inconsistent.

Limescale buildup and mineral deposits are especially common in older copper pipes or brass pipes. In very hard water areas like many Utah communities, harmful scale and efficiency loss can emerge in just 1 to 3 years.

Corroded Pipes Restrict Flow

Another issue is corroded pipes, particularly in older homes with galvanized steel plumbing.

Pipe corrosion forms inside the pipes, reducing their internal diameter and restricting flow. Over time, this can lead to severe water pressure problems.

If corrosion continues, it may even lead to leaking pipes, sometimes visible leaks, and in extreme cases, a burst pipe. When your home has extensive corroded pipes, repiping may be the best solution to restore normal water pressure.

Valves: Partially Closed Versus Fully Open

Sometimes the cause of low water pressure is surprisingly simple: a valve that isn’t fully open.

Main Water Shut-Off Valve Issues

The main shut off valve controls the water supply entering your house. If this main house shutoff valve is partially closed, it can reduce pressure across the entire system.

Make sure the valve is completely open. Many homes use a ball valve, which should align with the pipe when fully open. Partially closed valves are a surprisingly common culprit after plumbing work, renovations, or temporary shut offs.

Water Meter Valve Problems

Another valve to inspect is the water meter valve, which is typically located near the water meter where the municipal water supply enters the house.

If the water meter valve is partially closed, it may restrict flow to the entire home. When adjustments are needed, turn the valve slowly and carefully.

In some cases, this valve may be under your water company or water supplier control. Contact your utility if you need assistance or if you suspect the valve is obstructed.

Branch Lines Too Small Or Shared Supply

In some homes, branch lines may be too small for the water usage demands.

Undersized Branch Lines

If the pipe size supplying certain fixtures is too small, it can reduce water flow and create low pressure when multiple fixtures run simultaneously. For example, when someone showers while another person runs the dishwasher, the water pressure drops.

This issue is common in Utah homes that have undergone additions or renovations without upgrading the original plumbing. Upgrading branch lines to larger pipes can help increase water pressure in these cases.

Shared Supply Lines

In neighborhoods throughout Ogden, Provo, and Salt Lake City with shared infrastructure, homes connected to the same water line may experience low water when many people draw from the municipal water supply at the same time.

During peak usage times like mornings and evenings, demand on the public main is high. Pressure drops in the public main propagate to individual homes. Some areas at higher elevations may regularly see lower pressures unless booster systems are used.

Plumbing Fixtures And Aerator Clogs

Sometimes the problem isn’t the pipes or water line, but the plumbing fixtures themselves.

Cleaning Faucet Aerators

Most faucets include aerators that regulate flow. Over time, mineral deposits from hard water accumulate and block the openings. Clogged faucet aerators are extremely common in Utah due to our hard water conditions.

Because scale forms quickly on these tiny passages, homeowners often notice droplets or weak stream only when a single nearby fixture is affected. Cleaning the aerator can restore water flow and improve pressure. Simply unscrew the aerator, soak it in vinegar or a descaling solution, and flush thoroughly.

If cleaning doesn’t help, replacing the aerator with a newer anti scale design may be more efficient.

Showerhead Blockages

The shower head can also accumulate limescale buildup, especially in homes with hard water. Hot water side often shows worse buildup because heated water accelerates precipitation of minerals.

Removing and soaking the fixture in vinegar can dissolve mineral deposits and restore proper flow. If cleaning doesn’t provide lasting improvement, replacing older fixtures with self cleaning nozzle designs often provides better results.

Hot Water Issues And Water Heater Problems

If low pressure only affects hot water lines, then the likely culprit is the water heater. Within heaters, sediment like sand and minerals settles in the bottom. Scale may coat heating elements, dip tubes, or outlets, restricting outlet flow.

Flushing the water heater annually or as recommended removes sediment and restores flow. This is especially important in Utah, where hard water can cause significant sediment accumulation within just a few years.

Inspecting the inlet and outlet connections of the water heater can also reveal mineral buildup affecting water flow.

Leaks, Hidden Losses, And Pipe Damage

Water leaks in the plumbing system can divert water away from fixtures, causing low water pressure.

Inspect For Visible Leaks

Look for damp spots, pooling water, or visible leaks around exposed water pipes. Check especially near the water heater, basement plumbing, or outdoor hose spigot.

In Utah, freeze thaw cycles can stress joints or pipes, causing cracks. Frozen pipes that have thawed may develop small leaks that gradually worsen. Outdoor hose bibs may leak internally after winter damage. Interior plumbing exposing dampness, water stains, or mold indicate leaks requiring attention.

Monitor The Water Meter

A helpful leak detection step is checking the water meter.

Turn off all water in the house and watch the water meter. If it continues to move, you may have a leaky pipe or more than one leak in the water system.

High water bills without increased water usage may also indicate hidden leaks causing pressure loss and potential water damage.

Municipal Supply Problems And Well Water Issues

Sometimes the problem lies outside your house entirely.

Municipal Water Supply Issues

If you’re on city water, temporary issues with the municipal water supply may cause low water pressure.

This could include:

• Water main maintenance
• Major leaks or breaks
• Infrastructure repairs
• Fire hydrant use in your area

Salt Lake City has over 1,300 miles of pipe, with 15% being approximately 100 years old. Main breaks and maintenance can reduce pressure on nearby homes.

Contact your water supplier to see if other homes in the area are affected. Checking with neighbors can quickly confirm whether the issue is widespread or isolated to your home.

Private Well System Problems

Homes using a well system rely on a water pump and pressure tank to maintain pressure. If the pressure tank fails or the pump isn’t working properly, the water pressure throughout the entire home may drop.

Common well system issues include:

• Pressure tank becoming waterlogged and losing its air cushion
• Pressure switch mis set or failing
• Pump capacity declining from wear or low water table
• Sediment or clogs at intake

A malfunctioning pressure tank or pump is a common cause of low water pressure in Utah homes using private wells.

Diagnosing Low Water Pressure

Diagnosing water pressure problems requires identifying where the issue originates. The problem could stem from a single fixture, a section of your home’s plumbing, or even the incoming water supply.

How to Test Multiple Plumbing Fixtures

• Start by checking all the faucets and showers throughout the house.
• If most fixtures have low pressure, the problem likely affects the entire system.
• If only one fixture has issues, the problem may be localized.

Also test with multiple fixtures running simultaneously. If pressure drops drastically only under load, capacity rather than static pressure is limited.

How to Measure Water Pressure With A Gauge

• Attach a pressure gauge or test gauge to an outdoor hose spigot or garden hose connection.
• This reading will show how much pressure your home is receiving from the water supply.
• Compare the reading to normal ranges. Utah homes should typically see 50 to 70 PSI.
• If pressure is below normal levels, further troubleshooting may be necessary.

Whole-House Versus Fixture-Specific Diagnosis

Determining whether low water pressure affects the whole house or just one fixture can help narrow the cause.

• If the entire home has low water, the issue may involve the water line, pressure regulator, or municipal water system.
• If only one fixture has issues, the problem likely lies with that fixture or its branch lines.
• If only hot water is affected, examine the water heater.
• For well homes, check the pressure tank and pressure switch.

Troubleshooting Steps To Increase Water Pressure

When experiencing low water pressure, start with the simplest fixes. Document changes before and after each adjustment so you can track improvements.

Simple DIY Fixes To Increase Water Pressure

Homeowners can sometimes restore water pressure with a few simple steps. Try these tasks to quickly resolve minor water pressure issues:

• Ensure the main shut off valve is fully open
• Confirm the main water valve at the meter isn’t partially closed
• Clean faucet aerators and remove debris
• Clear blockages in the shower head with vinegar soaking
• Flush supply lines to remove mineral buildup
• Check for visible leaks around exposed pipes

Many causes of low water pressure have an easy fix that homeowners can complete without professional help.

Advanced Fixes To Increase Water Pressure

If basic fixes don’t solve the issue, more advanced solutions may be needed.

Replace A Faulty Pressure Regulator

The pressure regulator controls the amount of pressure entering the home from the water supply. If the pressure regulator fails, it may cause low or fluctuating water pressure.

Internal diaphragm or spring components can fail. Mineral buildup inside the regulator can block flow. Regulators often last 7 to 12 years before performance declines.

Replacing the pressure regulator or adjusting the water pressure regulator can restore stable pressure. This typically requires professional tools to measure and set correct downstream pressure.

Install A Booster Pump

In homes with persistent low water pressure, installing a booster pump may help. A booster pump increases water pressure throughout the house, especially beneficial for Utah homes far from the main water line or at higher elevations.

Booster pumps require correct sizing, controls, and pressure tanks to prevent cycling. Professional installation ensures proper plumbing layouts and electrical connections.

Preventive Maintenance For Low Water Problems

Preventive maintenance can help homeowners avoid many water pressure problems. Taking a proactive approach to maintaining your home’s plumbing system helps ensure that water pressure stays consistent throughout the house.

Consider these steps:

1. Flush the water heater annually to remove sediment
2. Install a water softener to reduce hard water and limescale buildup
3. Clean or replace aerators and showerheads regularly
4. Check valves and plumbing fixtures for proper operation
5. Inspect exposed pipes for early signs of pipe corrosion
6. Test pressure regulator settings yearly

A water softener may be particularly helpful in Utah. Softer water reduces scale formation in pipes, fixtures, and heaters. Many Utah homes experience visible scale within months without water softeners.

When To Call A Professional For Low Water Pressure Problems

If DIY solutions don’t fix low water pressure, it’s time to contact a licensed plumber.

A trained technician can inspect the entire system, evaluate the pressure regulator, and identify deeper plumbing issues affecting your water system.

You should call a professional if:

• You suspect clogged pipes or corroded pipes requiring repiping
• The pressure tank or pump on a private well is failing
• There are signs of leaking pipes behind walls or underground
• The pressure regulator needs replacement or adjustment
• High water pressure is causing other problems
• Booster pump installation is required
• You cannot locate the source of pressure loss

Professional diagnostics can quickly identify the cause and restore proper water pressure in your house.

Low Water Pressure In Your Utah Home? Call Mountain Home Services Today!

If troubleshooting hasn’t solved the issue, the experienced plumbers at Mountain Home Services can help. We understand the unique challenges Utah’s hard water and varied elevations create for homeowners in Ogden, Provo, Salt Lake City, and surrounding Wasatch Front communities.

Our team can inspect your plumbing system, test your water pressure, identify hidden leaks, and recommend the right solution to restore proper water flow throughout your home. Whether you need aerator cleaning, pressure regulator replacement, or comprehensive leak detection, we have the expertise to fix low water pressure efficiently.

Contact Mountain Home Services today to schedule a plumbing inspection and get your home’s water pressure back to normal.