maindrain

Hello my friend is purchasing a home with a pool and the owner says when the original pool heater was removed the contractor disconnected the main drain (closed it off for non use) and the pool now filters through the skimmer return and the pool cleaner only. Is it ok to seal off the main drain...

Sorry for the lengthy post but I want to make sure I cover everything. my wife and I recently purchased a home with a pool. Its roughly 15 x 30 20k gallon inground pool. When we purchased the home we had a few contractors come out to look at the surface and equipment as they were on the last...