I think i've found the problem with siphoning when the pump is off. I could hear the sand filter draining thru the inline chlorinator when power is off. I believe hooking to the bottom pipe inlet is causing the siphoning problem. With the tube removed and the pipe plug replaced there is no siphoniing.. Ive tried everything else i can think of,, valve change, etc.. I guess the only thing to do is drill hole in the return pipe and use the clamp provided with the liquidator.
Anybody used the clamps and drilled your pipes?? Is it very much trouble or chances of ruining pipe? Just in case is the hole easy to plug,, advice desperately needed.... thanks!