Hi. The brass sealing ring (10 hole Amerlite) around my light niche has corroded to the point that the screw hole for attaching the light has dissappeared. I have purchaed a new stainless steel sealing ring and the requisite seal. My quesiton is this...would it be a good idea to attempt changing the sealing ring without draining the pool below the light niche? I've seen some forum posts which have mentioned that it's ok to do so, but i'm a little reluctant, since i'm not sure what the implications are of getting water behind the liner.
I'll do what I have to do, but my pool is a 20 x 40. If I can avoid draining and refilling 9000 gallons of water, I'd like to do so.