I set up my pool last week with the Intex Sand and SWG combo --- no leaks. I hadn't used the SWG yet - just operating in FP mode. In fact, I haven't added any salt or CYA yet - just bleach - because I was going to drop the water level to hard plumb everything.
After reading several TFP forums and posts, I just had to get rid of the Intex hoses and plunger valves and of course install a fountain. Thanks for all the great ideas!!!
I'll post some pictures later. Everything works great except for a small amount of percolating on the top of the Intex eyeball return (I switched to the bigger returns that came with the upgraded filter. It's inside the pool and barely percolates a 1/2 inch or so - but that's not my concern since it doesn't leak outside of the pool. BTW, when I did my first mods I used the return that came with the Hayward skimmer. The return had a washer for the inside and outside. That one leaked on the outside. I decided to go with the new Intex return that came with the new filter. It only had one washer for the inside - works great - no leaks on the outside.
After I hard plumbed everything - has to be 30 - 35 pieces of PVC - I would have bet on a leak somewhere - zilch - very happy! When I turned on my Intex filter I had leaks in two places. Like I had never tightened the hose nuts which I certainly had done. The nut on the electrolytic cell needed to be tightened. Done - no more leak. Then I tightened down the hose from the 6-way valve inlet and the motor outlet. I have either a trickle or a gusher depending on how hard I tighten the nut. Just when I think it won't leak anymore if I tighten 1 more slight bit, it seems to go off the thread, get very loose, and gush water. It doesn't leak when I turn off the filter. HELP???