Can My Water Heater be the Cause of My Low Water Pressure?

Male Worker With Clipboard Adjusting Temperature Of Water Heater

Low water pressure can be frustrating. If it seems like your hot water pressure is exceptionally low, you may be wondering whether your water heater is to blame. Here we look at how to determine whether your water heater is causing low water pressure.

Using On-Demand Instantaneous Water Heater

An on-demand, instant water heater is an excellent investment for your home as they provide endless hot water in a more financially and environmentally sustainable way. However, because on-demand water heaters work only to provide the hot water you need when you need it, they are limited by flow rate. If you are using too many appliances or hot water outlets at once, your on-demand water heater won’t be able to keep up, and hot water pressure will be reduced. You can compensate for this by timing the use of your hot water using outlets and appliances, so you don’t use too many at one time. Alternatively, an additional on-demand heater can be installed to supplement hot water pressure when using multiple outlets.

adjusting valve on water heater tank

Water Heater Shut Off Valve Closed

The most common cause of low hot water pressure is the water heater shut-off valve being partially shut. Each water heater has a shut-off valve to use in case of emergencies. In some cases, this valve may have been closed, and never fully opened again. Even if the valve is slightly closed, it can cause a significant decrease in hot water pressure. It’s easy to check that the shut-off valve on your water heater is fully opened to restore hot water pressure.


Mineral Build Up in Water Heater Outlet and Pipes

Another common cause of low hot water pressure is buildup of minerals, rust or other sediments that can collect in the tank, outlets, and pipes connected to your water heater. As hot water lines from your heater to your outlets become more blocked and narrow, the flow rate of water through the pipes decreases. This means lower hot water pressure once the hot water reaches the outlet. Your plumber has methods to quickly check tanks, connections, and pipes to and from the water heater. Rinsing out the tank annually can help, but if your pipes are blocked with sediment, you may need plumbing repiping.


Is Your Hot Water Gravity Supply Or Mains Pressure Supply?

Older houses may have been built with a hot water tank in the roof, where hot water is fed to the outlets in your home by gravity. Generally speaking, gravity feed hot water systems have lower pressure and flow rates than mains pressure hot water systems. A water heater replacement to install a mains pressure system may be the only realistic solution for low hot water pressure from a gravity feed system. You will need your plumber to install a new mains pressure water system as equipment designed for use in a gravity feed system is incompatible to be reused with a mains pressure system.

If you are having issues with your mains water supply, and not just your hot water, it’s likely that something other than your water heater is causing the problem. It’s best to call your local plumber Magnificent Plumbing or the local water supply utility for assistance in this case.

With these tips, you can look at how to increase your hot water pressure for more satisfying showers and better functioning appliances. For expert help in getting to the bottom of water pressure issues, contact your local plumber, Magnificent Plumbing for safe, professional assistance.

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