Hello. I have a Pentair FNS Plus 48 filter, these come with a drain plug in a cavity at the bottom
I never used it because the piping for inlet and outlet was left to close to it and there is no room for a wrench to turn. I usually put the valve in back wash, open the top air relief valve and water drains on its own.
Unfortunately the plug developed a big leak, water shoots out from it when the pump runs, so I need to replace it.
I imagine if I take the whole filter apart, which I'm going to do anyway for a thorough clean, I could try to undo the drain plug from inside.
Has anyone tried it? Any tips?