Reviving an old thread here...
Topic split. Please ask questions in your own topic, rather than hijacking someone else's existing topic. JasonLion
I have drain covers (plaster pool and spa) that look exactly like those pictured in the schematic by OP (left side, photo attached below) and I'd at least like to replace them with the ANSI/ASME compliant covers.
Thankfully I can empty the spa so I can easily get to the drain and the existing cover outer diameter measures 7 3/4", and 7 3/8" between the existing screw holes, which like the OP have no screws in them. I looked up the StarGuard 500108 and their brochure shows the screw holes are slotted a bit and the largest distance between them at 7.6", so hopefully they are adjustable enough to go down to ~7.4".
I ordered the StarGuard 500108 as JamesW suggested as it appears to be the right fit and the only one I could find that listed the exact dimensions. Unfortunately the picture amazon showed with it did not have slotted screw holes, but most others I saw did, so hopefully the one I receive also does.
I have a few questions I was hoping you could help me out with:
1. I searched around and found a website called aqua-man that lists the 8" Retro Sumpless Suct.Outlet Cover R8HP101 as a replacement for the Sta-Rite 07017 that appears to have the screw holes located at the correct location, but they don't list the exact screw hole measurements, so I was apprehensive about trying this one. Any info on this?
2. Like the OP my drain cover is w/out screws, however appears to be quite securely fastened. I've tried using my hand to twist and pull (no tools yet), and it does not budge. I didn't want to damage the existing cover until I at least had a new one in hand. What is the best way to get the old cover off, screw driver between the cover and ring and pry it up?
3. Once I have the old cover off, if I do not have suitable screw holes for the new cover, what is involved with replacing the ring? It appears to be plastered in to me.
4. Can you tell me if my cover is indeed the Sta-Rite 07017?
I appreciate you all helping me out with these questions.