how to drain the central heating system and how to refill
- Thread starter ronaldm
- Start date
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do you think it might help just a little if you told us why you need to drain and what the system is 
i'm not sure about my system but i have 2 cistern tank on my loft of the same size, not sure which one goes to the sink and which on goes to the heating system. my radiators heat up only on top but not on the bottom so i wanted to remove the sludge deposits. oh can u recommend a de-sludger
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you need to tie up the ballvalve in the heating tank
run a hot tap and see which one fills (the one you want is the other one)
turn off both valves drain and remove a rad at a low point in the system
attach a hose to the valve and drain through that
might be worth fitting one of these
or cut a tee in and fit one of these
good cleaner sentinel x 800
if the system is sound you might try fernox ds 40
run a hot tap and see which one fills (the one you want is the other one)
turn off both valves drain and remove a rad at a low point in the system
attach a hose to the valve and drain through that
might be worth fitting one of these
or cut a tee in and fit one of these
good cleaner sentinel x 800
if the system is sound you might try fernox ds 40
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