I have a Pentair Amerlite 500w pool light (pictured below) that has been leaking since my pool was built years ago. I did not notice it right away and figured it was something I could fix on my own quite easily...not the case.
Here is what I have tried:
1) Bought and installed an aftermarket gasket. The light leaked even worse.
2) Ordered and installed an OEM gasket. It leaked as much as the original gasket. Tried and tried again with no luck.
3) Tried sealing the entire case and lens with silicone, letting it cure then installing. The leak slowly returned. I tried this procedure several times but it seems that the heat of the light causes the silicone to fail.
Each time I submerge after an attempted fix, I get about 3/4" of water in the light. On occasions where the leak is fast enough I see air bubbles coming from roughly the 6 o'clock position. There does not appear to be any deformations in the light case and I am out of ideas and frustrated.
Any thoughts or advice? As always, thanks for any input.