Plumbing and drainage here means leaks, tap and pipe repairs, weeping radiator valves and blocked wastes in the homes we already visit for heating. Describe the problem and we will say whether it is a job we can help with. A question we get is whether a leak from the boiler is a plumbing job. If the boiler or cylinder is involved, we look at that as part of the same visit rather than guessing from a description.