Possible Causes Of Low Hot Water Pressure

Low hot water pressure is an inconvenience no one wants to deal with, but it sometimes happens. Below are potential reasons for low hot water pressure.

Sediment Buildup

Hard water has dissolved minerals that sometimes crystallize and collect within water heaters. If you live in an area with hard water, the accumulated sediments might break off and flow into the heater's outlet along with the hot water. If that happens, the sediment chunks reduce the pipe's diameter and water flow.

Pipe Kinks

A pipe's diameter determines the water volume it delivers. Kinks on the pipe, for example, due to construction damage, constrict the pipe and reduce the water flow. Thus, you might experience low hot water pressure due to damage to your plumbing pipes.

Sharp Pipe Bends

Plumbing design and installation affect efficient and adequate hot water delivery. Ideally, the path between the water heater and hot water points should be straight and short. A convoluted pipe with multiple bends reduces the water flow rate.

Shutoff Valve Malfunction or Maladjustment

Your water heater has a shutoff valve to cut off water flow and prevent damage in case of a malfunction, such as a water heater leak. The valve might malfunction and remain stuck in a partially closed position, reducing hot water flow. An accidental knock of the valve can also prevent water flow.

Pressure Regulator Malfunction

The temperature and pressure regulator opens to relieve excess water pressure in the tank if the pressure exceeds a certain limit. Pressure relief is a safety feature since excessive pressure and temperature can cause injury and tank damage. For example, excess pressure can burst the tank and cause water damage.

The regulator might malfunction and relieve tank pressure even if the pressure is within safe limits. Expect low hot water pressure if that happens.

Fixture or Outlet Blockages

You might also experience low water pressure not because of the water heater issues but due to issues with your fixtures or outlets. For example, grime, scum, and debris can block showerheads and reduce water flow. Corroded faucets can also experience low water pressure as the corrosion blocks water flow.

Pipe, Fixture, or Outlet Leakages

Lastly, leakages at any point in the hot water path can also reduce hot water pressure. For example, if a hot water pipe leaks behind a wall, the faucet that receives water from the pipe will experience reduced water pressure.

As you can see, multiple issues can cause low hot water pressure, so you need a professional diagnosis. Contact a plumber for more information.