What Causes Low Water Pressure?

Low water pressure can be frustrating when it affects many aspects of daily life, from showering to washing the dishes.

Low water pressure can be frustrating when it affects many aspects of daily life, from showering to washing the dishes. The problem may seem minor initially but can indicate a more significant issue. Understanding the underlying causes of low water pressure is essential to determine the appropriate solutions to remedy the problem.

Here are some of the causes of low water pressure:

Clogged pipes or fixtures

Mineral buildup, debris, grease, and sediment can accumulate over time and clog pipes or fixtures. This can lead to low water pressure in specific areas, such as showers or sinks.

Leaking pipes

Leaking pipes can lead to low water pressure as the water may divert from the intended destination. The leaks may result from broken seals, corrosion, clogged lines, improper pipe laying, movements underground (due to tree root growth, small earthquake, or flooding), and defective pipe joints.

Damaged water mains

A damaged water main can cause a drop in water pressure throughout the house. This can happen due to age, corrosion, or accidental damage.

Water pressure regulator problem

The pressure regulator aims to keep steady water pressure in the plumbing system. Adjustments are frequently unnecessary as the manufacturer usually sets the pressure at 45 to 60 psi. One can solve low water pressure by adjusting the regulator. But if the problem persists, the regulator may need fixing or replacement.

Closed valves

The main valve is usually located close to the water meter, controlling the water flow as it enters the house. Smaller valves, commonly found at individual fixtures, mark the transition from the branch water supply lines to the tubes that deliver water to faucets, toilets, and other appliances.

When the valves are even partially open, the water pressure could decrease. To obtain full water pressure, open the valves fully.

Municipal water supply problems

Issues with the municipal water supply, such as maintenance work, can cause temporary low water pressure throughout the area. These are issues that can’t be solved from home. Contact the water supplier and ask them to address the problems immediately.

Low water pressure from the source

If the water pressure is low from the source, or the source cannot provide sufficient water pressure, it can result in low water pressure in the house.

Leave the job to the experts

Low water pressure has several causes, and fixing the issue may require technical expertise. While some solutions are straightforward and can be done by the householder, others need the services of a reputable plumber.

Remember that DIY methods don’t always work and can result in more significant problems. Consider hiring a professional to ensure that the problem is accurately diagnosed and repaired.


Much Better Plumbing is the premier residential and commercial plumbing service for homeowners and businesses in the Las Vegas area. We are licensed, bonded, and insured. Call us today at 702-996-5220.