Why is the water supply ridiculously noisy when my neighbour uses their washing machine?

New tenants moved in next door earlier this year. Fairly soon on, I noticed how noisy the water supply was, when they used their washing machine. Imagine the 'water fill noise of the water rushing through the cold mains supply if you are standing next to your washing machine - now imagine this level and type of noise being audible from the party wall, in every room of the house! (Neighbour hears it in their house, too.)





I have spoken to them a few times, they did have problems with the shower and hot water early on, which meant they had a plumber out.





Suggestions so far, are that their water pressure is too high - could have been wrongly adjusted when the plumber came out but then why doesn't the noise happen with all mains feed, e.g. taps? OR that a stopcock or valve somewhere isn't fully open so the water is forcing itself through and this echoes through the whole system.





Both these two make sense but I can't understand why it only happens with their washing machine. Could it be the way it's plumbed in or just a pants washing machine?





All helpful suggestions gratefully received, will be phoning their letting agent once I have a better idea of how to explain the problem.Why is the water supply ridiculously noisy when my neighbour uses their washing machine?
Have them check the wash machine hose connection inlet screens.


They may be restricted causing the noise.Why is the water supply ridiculously noisy when my neighbour uses their washing machine?
I think the problem lies in the hot %26amp; cold water feeds to the washing machine. If their Plumber has fitted isolation valves to the machine, and they are not turned fully on they are very noisy. Try turning them fully on and I think this may solve your problem. Good Luck!
Are the pipes secured to the wall with clips? If not it may be the pressure of the water making the pipes move. Or maybe they need to turn the pressure down?