How do you remove a "stripped" top from a Hayward C900 pool filter?

Question

Without damaging the filter body?

Answer 1

The filter case is salvageable even if the top nut is stripped. There are a half dozen ways to do this and it all depends on the space you have to work with, how far down that nut is engaged and your skill with hand tools.
I've had to do this twice with stubborn hayward cart filters and had to use a different approach both times.
Your best bet is to get a tech in. There's just too many "ifs" here to suggest one method over another and ideally you want to start with what may work with the least damage, first. No telling what that is unless you post a picture of it or have someone actually look at it. If you have room and the nut isn't engaged fully, myself, I'd be cutting off the plastic surrounding the brass for both a better look and to see if it's worth a shot at cutting the brass threading off being careful not to ding up the rod threads. Like I said though, it's all a judgment call. If you do decide to tackle it, be careful.You can easily bugger up the lid and also potentially snap the rod out of the base. The lid isn't cheap and the base is fatal.

Answer 2

Hayward C900

Answer 3

If the threads are indeed 'stripped' then the body is already damaged. In checking the schematic for this unit, it appears that the top is screwed into the base, thus making both pieces useless if the threads are stripped.

Answer 4

Might try softening it with a propane torch?