Sometimes when I turn off the tap's, the supply pipe start's to rattle.
I am not on a pump system, and have a storage tank in the attic.
I live in Ireland. House is 30 years old. Please help.

speedball1

Are you in the US and how old is your house. Regards, Tom

Michael Fullard

Ireland. 30 years.

speedball1

It didn't sound like you were in the states. Is your system gravity fed or do you have a booster oump? Over here we install air chambers, (shock absorbers, see image) on all bathroom sinks and the kitchen sink. These are hidden in the wall so you won't be able to see them. Can you call a plumbing shop and ask if you install them in your country? Regards, tom

Michael Fullard

Hello Tom.
Thank you for your reply. I know the air chamber you are talking about,
we do not use them in this country.

speedball1

Then your best bet is to make and install one of your own. Cut a tee into the supply from the storage tank and install a 3/4" pipe with a permanent cap about 14" long. this should absorb any shock caused by water hammer. Good luck, tom

letmetellu

Michael this is just a thought but could it be possible that the pressure tank in the attic could be becoming "Waterlogged" if you are not familiar with this it is when the tank loses its air space and has too much water in it. Normally the air in the tank acts as a cushion when you turn off the water, because water does not compress it will ram the end of the pips and make a hammering noise.
Not knowing what you have as a system it is hard to tell you how to remedy the problem if indeed this is the problem. But in short you have to introduce more air into the tank, normally a tank only fills about half full with water ...the rest is air.

Michael Fullard

There is no cover on the tank,so air presure is not the problem.
Thank you.