Clean blockages without damaging your pipes! For new and replacement boiler installations you must have either: a timer or programmer with a room thermostat and thermostatic radiator valves or a programmable room thermostat and thermostatic radiator valves. The water was inside the tubes, and the fire of the ... Please click below to play the video! Compare quotes from several installers to make sure you get the best deal, and look for companies that have been in business for several.