What Causes a Noisy Heater System?

There are a number of possible reasons for noisy hot water pipes or a noisy hot water system and a plumber’s investigation is a must. A gas or electric water storage heater is essentially a vessel filled with water, and it has no moving parts. Therefore, it is unlikely that there is any knocking or tapping noise in the hot or cold water system. Furthermore, attributed to the water heaters’ function and performance.

Non-Return Valve

The sudden stopping of the water flow, especially if installed with a non-return valve. So it can result in a “thumping” strange noise. Suddenly turning the hot water tap off can cause a small wave of energy to travel back down the hot water pipe. In addition, usually, this wave of energy diminishes as it passes through the water in the pipe. If fitted with a non-return valve, the wave of energy comes to a sudden halt, causing a “thump” or popping sound. Turning off the water and the relief valve will confirm this cause.

Pipe Vibration

If there is a continued knocking, vibration or whining noise, try replacing the tap washer. Hence, this usually means that there is a split, damaged or defective tap washer in the tap housing. A knocking or tapping noise may be heard if long runs of water pipe are not properly attached inside the floor, wall or ceiling. This knocking is ‘Water Hammer’. As a result, when the pipes vibrate against a floor, wall or ceiling cavity. Therefore, to remove the knocking or tapping noise, try securing the water pipe to prevent movement.

Mineral Build Up

If you hear a knocking or tapping noise during the heat-up cycle of an electric water heater, there may be some mineral build-up on the hot water heating element, or it could be that the water quality is poor. The sediment builds at the bottom of the tank using a scale build. Flushing your water heater prevents sediment from building up in an electric water heater. Check the cold water supply quality for the mineral build-up and clean the heating element. If required, drain any sludge from the water heater.

High-Pressure Water

If you can only hear a popping noise when water is flowing through the water heater, check for faulty pipe work or valves. Check that it is not a water hammer, and if the water pressure is excessive (above 700kPa), it may be necessary to install a pressure limiting valve. Open the drain valve to confirm the cause of the noise. Checking the hot water faucets and the hot water tank is also part of the checklist.

Apex Plumbing Solutions is here to provide expert hot water service and advice in Sydney. We stock a fantastic range of well-known and trusted brands, all covered by comprehensive warranties. In addition, energy efficiency and long-term use of all water heaters.

As licensed plumbers, when it comes to looking for the right hot water plumbers to fix the problem, contact the Plumbing Services team so they can help you. You may check our highly-rated reviews here. We’ll wait for your call!