Need a drain unblocked, or have a problem with your drain? No formal qualifications needed. Other delivery options are available, please visit our. Are you planning on installing a new central heating system for your home? Another option is to replace a narrow pipe with a wider one, where the temperature would have to be lower for ice to form in the pipe to the extent that it became blocked. The all in one design of the high efficiency boiler with optional water heating results in considerable cost.