When we use a lot of cold water at the same time, e.g. flush the toilet and then brush teeth, there are vibrating sounds from the cold water tank and connecting pipes. We've made sure the water inlet tap is open on full but this hasn't solved the problem. Any ideas?
if you have an indirect cold water system (ie tank fed) just replace washer and seating in the ballvalve. to test this just lift ballvalve when noise starts
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