If you have high water presure some of them foam up when the tank fills and overflow. it happened to us 3 days affter we put one in. lovely blue stains on the floor now. would have ruined the wall paper to but we had luckly strippen the walls to re decorate. but the carpet is ruined.
Ther is an easy cur wher the water enters the tank attach a piece of hose pipe so it just touches the bottom of the tank. this cuts down on the turbulance of the water and also the noise.
