Hi guys, I'm biting the bullet and having my open vented system chahged to an unvented with a new boiler. The boiler is going to be a Vaillant 630 and the tank a Gledhill 250l. My plumber recomended this instead of the Vaillant tank - any advice if the Gledhill is any good? Also the main question, he said don't bother with a power flush. I'm to drain the system put some de-sludge in for a week and then he's going to do the work. Does this sound right? All the info I have read says to power flush. Ok its saving me a few bob but I want the set up to work as its costing me £4750. He says it will be just as good as he is fitting a magnclean in as well.
One last question - when the flow was checked I was getting 22l/min, although this was through a 15mm pipe. I've been told this will increase to 30l/min as the pipe is currently on a 22mm to 15mm reducer. When its straight through the 22mm pipe i'll get the 30l/min. Does this also sound right.
Many thanks in advance
One last question - when the flow was checked I was getting 22l/min, although this was through a 15mm pipe. I've been told this will increase to 30l/min as the pipe is currently on a 22mm to 15mm reducer. When its straight through the 22mm pipe i'll get the 30l/min. Does this also sound right.
Many thanks in advance