Common Plumbing blockages are caused by a gradual build up of particles. Plumbing Common blockages can be a problem that goes unnoticed for some time until it gets so bad that there is no longer any movement of water. After having a bath or a shower and the water released takes longer than usual to drain away this is caused by a gradual build-up of particles restricting the flow through the waste pipe. The best way to try to eliminate this problem from occurring is not to allowin...