Anyone had any experience of the "Mini Rester" on the Toolstation website (code 85345 )which is meant to stop water hammer? If so did it work and where did you fit it?? We've got hammer which we think is caused by a toilet which was not converted from low to high pressure when the plumbing was changed to a pressurised sytem. Unfortunately the loo in question is one that encloses all the pipework and has then been sealed all round to the the tiles so getting out to change the inards of the cistern could be a major job!!