Hello, I'm hoping that someone can advise me about a problem with our central heating. We moved into a 1920s detached house two months ago and have found that the boiler cuts out every 2-3 weeks. A heating engineer has diagnosed this as being due to the radiator valves leaking, which causes loss of pressure in the system. We have open taps on the boiler to top up the system, but the engineer says we can't keep doing that as it will draw corrosion-contaminated water into the boiler each time, which will eventually damage it. The radiators are probably from the 1970s or 80s. My question is - should we just replace all the valves to stop the leaking (quoted approx £250 plus vat), or would that just be putting off the inevitable? Should we just bite the bullet and replace all the radiators as we are planning to be here for a good 25 years!? The quote for that is approx £1400 plus vat. Would new radiators be more energy efficient and therefore save us some money that way? I'd be grateful for any advice, thank you.