I am attempting to clean a Jandy DEL 48 for the first time. No idea how many times the previous owners cleaned it out in the 7 years prior.
Since it's an indoor pool, flooding is a concern, so when I follow the instructions, and open the drain cover, water gushes out. It slows down some, but keeps on coming. I also hear bubbling in the pipes around the filter pump.
Note, I have not found an isolation valve, and the equipment is located above the water line of the pool.
Here are some pics: