A relative has a 15 years old Wilo pump that is on its last legs, being rather noisy. He was told over the phone from a company when getting a quote to replace the pump, that a modulating pump these days has to fitted as the reg's state so. Is that true? Or is this just a recommendation?
His system has an auto bypass valve to ensure water flow through the boiler if the thermo-radiator valves all close down. The hall radiator is where the wall stat is and the radiator has no thermo-valve on it. A modulating pump would be of much use as far as I can see.
thanks.
His system has an auto bypass valve to ensure water flow through the boiler if the thermo-radiator valves all close down. The hall radiator is where the wall stat is and the radiator has no thermo-valve on it. A modulating pump would be of much use as far as I can see.
thanks.