How soon do you require a service? Broken or blocked derby sewers or sewage pipes. All blockages and bust pipes repaired. We’re confident in the excellence of the boilers we install which is why we offer an extended boiler warranty of up to 10 years this means that your boiler could be covered for a whole decade after you have purchased it. Ums ltd is located in elgin, scotland we offer independent cctv surveys using the latest equipment available. Meet the workhorse of the power.