Non-motoring > TRVs Miscellaneous
Thread Author: bathtub tom Replies: 22
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New Fri 3 Dec 21 21:35 
 TRVs - Kevin
If you open the bleed screw without closing the TRV and lock-shield you'll still get water coming out of it.

If you don't know the history of the CH system I'd drain it completely anyway, flush and refill with fresh water and fernox.
Good opportunity to drag the rad outside and flush the carp out of it too.

BT. When you close the lock-shield make a note of how many turns it takes to close otherwise you might end up having to fiddle around getting the rad balance right again.
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