What’s that hammering noise?

Why do I hear a hammering noise coming from my pipes? Is this a common plumbing issue and how can Doherty Plumbing Solutions help?

Emergency plumbing Glen Waverley

An anxious customer from Glen Waverley reached out to us, suspecting a fault in their hot water plumbing connection. They had heard strange noises coming from the pipework when the hot water taps were turned off in their laundry, bathroom and powder room.

Doherty Plumbing Solutions’ licensed plumbing professional George was at the scene to resolve the problem.

After an inspection, George detected the cause of the noise was water hammer occurring inside the connection.

He looked into the Aquamax gas storage heater unit outside the building and located the faulty duo valve that was quite old. After isolating the water supply, George replaced the old valve and re-connected the supply line directly to hot water outlet. Then, the plumbing fixtures inside the house were all tested. The situation was much improved!

Well done, George.

What is ‘water hammer’ effect?

Water hammer, or hydraulic shock, involves a sudden shock experienced by the water flow inside a pipeline, after it has encountered a blockage (such as a shut-off valve). Once the flowing water hits this block, the water molecules’ tendency is to retrace their flow in the opposite direction, when they collide with the incoming molecules. This sudden change in direction of the water creates a huge pressure surge moving pipes, causing a banging sound.

How can high water pressure damage pipes?

The increased pressure build-up due to a water hammer effect can not only damage pipelines, but also cause cracks that lead to water leaks. They can even harm the various valve systems in the plumbing connections, snowballing into additional effects on connected appliances. For example, it can blow off the diaphragm in pressure tanks resulting in irregular water flow, or affect water meters.

How to tackle the water hammer issue?

It is crucial to maintain the pipelines regularly with the help of professional services, such as Doherty Plumbing Solutions. Undertaking checks of the pipework, ensuring there are no blockages, and fitting pipes in correct alignment, are important first steps that can help in the long run.

Additional measures could also include the following:

  • Fitting valves that close slowly to prevent sudden blockage.
  • Ensuring pipelines have built-in provisions for air chambers, which act as shock absorbers to reduce the effects of accumulating pressure.

Who can help with water hammer issues?

Don’t let a water hammer issue cause extensive damage to the plumbing connections and fixtures. Act fast, TODAY!

At Doherty Plumbing Solutions, we are here to help you tackle the bang and prevent a potential disaster in your home or business.

Contact our team at:

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    Arrived at the scheduled time, completed the work professionally and in a timely manner, and to our complete satisfaction, as has always been the case in the past. Staff are always polite and skilled.
    Roger Wilson Avatar
    Roger Wilson
    10/13/2024
    I had a great experience with the team at DP when they promptly addressed my hot water piping issue. George worked efficiently, and he was friendly and professional throughout the visit. He did a thorough job and took the time to ensure everything was done correctly. I would definitely recommend their services and would not hesitate to call them again.
    Susan Lim Avatar
    Susan Lim
    12/16/2025
    Came same day as I called to fix broken tap that couldn’t be turned off (had to turn water off at mains to stop flooding). Third time I’ve used them within 12 months for different issues. Very helpful, professional staff and reasonable pricing. Highly recommended.
    Garry & Wendy Grinsted Avatar
    Garry & Wendy Grinsted
    4/23/2024
    Great experience - notified me when they were coming and knew exactly how to fix a difficult problem in lightning time.
    The Crack Avatar
    The Crack
    4/23/2024
    The first gentleman I arranged the appointment with at Doherty Plumbing was most helpful & the attending plumber was a lovely, polite young man who arrived promptly, worked efficiently & completed the job well. Greatly appreciated.
    Denise Dixon Avatar
    Denise Dixon
    10/27/2025
    Super quick diagnosis and service from the crew at Doherty’s Plumbing. The plumber who attended was really friendly and helpful. Highly recommend 😉
    Peggy Couper-Woods Avatar
    Peggy Couper-Woods
    10/21/2025
    The 3rd time I have used the Doherty team for Plumbing issues and I highly recommend them! Responsive, professional, polite and reasonably priced, all make for a great experience.
    Matt Lane Avatar
    Matt Lane
    2/29/2024
    I have been dealing with Doherty Plumbing for some years and I find them to be professional, knowledgeable and prompt. Their costs are very competitive. They are quick and always fix the problem. They have been so competent and reliable, that I will always call them and never go anywhere else.
    Gillian Morgan Avatar
    Gillian Morgan
    2/06/2025
    Prompt responses, competitive pricing and jobs completed in a timely manner. Would recommend and will use again for other jobs.
    Greg Wood Avatar
    Greg Wood
    10/01/2025
    Once again it was a pleasure dealing with Doherty. Thank you to Brian for promptly organising the visit and thank you to Tim for arriving on time and clearing the blockage. Highly recommend their services.
    Sue Smith Avatar
    Sue Smith
    10/02/2025
    For reliable plumbing services, call 03 9877 5775 or 0417 577 432