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I'm not sure why the pumps fail - I've probably only had a couple that have reached the stage of actual failure. I'm perhaps just overly sensitive to a deterioration in noise from them and replace them when they start to sound a bit "rough". Being a stove in the kitchen, you hear these changes...

Yes, taping it to the instructions might help! Danfoss have it inserted by default, so you have to remember to remove it. For some reason my (24 year old) boiler eats a pump every couple of years, and I have done the replacement so often, I had relaxed into "I can do this in my sleep" mode...

Doh! Forgot to remove the one-pipe system screw!

I installed a new Danfoss BFP20L3 in my elderly Rayburn 480k. The Danfoss comes pre-set to 10bar but checking the fuel pressure suggests it is giving me 15 bar. The reading on my gauge remains at 15 bar when the pump is running regardless of the positioon of the pressure-setting screw on the...