I've just drained my central heating system, removed a radiator in the bathroom, fitted a new radiator. Gone to refill it and nothing's happening - water's not flowing Now discovered that water's not draining from the header tank. I think there's a blockage in the upstairs radiators. Is there a quick and easy way of clearing the system?
Blockage is probably in the feed from the header tank. Have you checked the outlet is not blocked in the tank? If clear the pipe is probably blocked
where abouts would the header tank pipe join the main system? poss in your airing cupboard near your yeah..open the rad bleed valves thats not going to clear a blockage is it.
Many thanks for that ----------plumbing - going to give it a try tomorrow. Spent too long on it tonight I've read some of the other enquiries and also going to try flushing the system by connecting to the mains and draining the system. I'm assuming that reverse water pressure might clear the blockage between the header and main the system - as long as i watch it so that i don't flood the tank!! Watch this line tomorrow!
I've managed to back fill all the radiators. Next problem is that they're not heating up - i think there's a blockage between the head tank and the main system. I've flushed the system in both directions but the head tank won't drain. HELP!?
You've clearly got a blocked cold feed pipe, if it's a proper blockage like most are then the only way it can be unblocked is by cutting into the pipe work and physically unblocking or by replacing blocked section of pipe work. If you follow the pipe that comes out of your header tank down into the airing cupboard it will eventually come to a tee, this is where it joins into the system and will need unblocking at this point.
Assume the boiler comes on and the pump is working, the stats are calling for heat, zone valves are open and all the rad valves are open? Does the boiler stay on or close down after a few minutes? The header tank feeds a 15mm pipe into a 22mm tee, usually compression and sometimes near the cylinder.If you drained the system and the header tank remained full the likely blockage is at this point.
Many thanks for everyone's wisdom. Got my local cplumber out to take a look. It appears the air/water filter / divider thingy is bloked up. The plumber used his magnet clearly showing the build up magnetic sludge. Cos the blocked part is pretty inaccessible i'm probably going to replace with a combi-boiler system and do away with all the tanks. Looking for estimates to replace with:- 1) a valiant combi boiler 2) 4 TRV 3) programmable thermostat Can anyone guess-timate a price for this work?
If you take your motor to 'Nick and Fit' and they tell you to replace front and rear discs as well as pads do you get your credit card out or go home and whip the wheels off and have a butchers? If you get your card out then go for a new system, if you have a look and get a few opinions then maybe a new boiler is needed. How about flushing the old one out? Yes we are in business to make money - but if you want a serious quote for a vaillant combi then tell us your heating and hot water requirements. I can knock a tenner of £3k for cash ;o)
The plumber used his magnet clearly showing the build up magnetic sludge." An old trick, don't fall for it, as tightenit says think about cleaning out your current system first.
back filling is one thing, but im not sure id ever knowingly leave a system running with a blocked feed & EXPANSION pipe..... only the open vent to block up before you blow a hole in the side of your house. like said 3k cash is bout right... i just did one for 2.6k cash but shouldve charged more really.... boiler in garage, removal of wall heaters etc....
Forums
Facebook
Twitter
You Tube
Instagram
Shop