I have a Baxi Bermuda 552 back boiler which gives pumped central heating and (what I believe is termed) gravity hot water, ie, when system is set to hot water only, the upstairs rads get warm as well.
I drained the system down today to replace a radiator (pipework needs altering) and I'm going to take the opportunity to also put in sludge and gunk remover, flush and finally add inhibitor. I went into the loft to tie up the ball valve then drained the system from the lowest drain c*ck (which took about 4 hours, even opening the bleed valves on the upstairs rads when the water level ahd dropped enough).
Thing is, we now have no water coming out of the hot tap. I knew we wouldn't have _hot_ water because there isn't any heating to heat it but I still expected water to come from the hot tap. My missus has had the washing machine on almost all day so that may well account for it, but that leads me to the conclusion that the tank in the loft where I tied up the ball valve, also feeds the domestic hot water system. Is this correct?
My original plan was (when I'm ready) to pour the sludge remover (and later the inhibitor) into the tank in the loft but if it does, indeed, also feed the domestic hot water then I guess that's a no-no, so just how do you get it in there?
Cheers,
Mogweed.