I noticed the other day that the collar that the flow sensor screws into (I have a SWCG) has a fine crack and is leaking a little.

I thought about just putting some epoxy (I have some marine epoxy on hand that I used to repair a Hayward Viper cleaner) on it, but someone mentioned they didn't think epoxy would stick very well to PVC.

Because of the way the flow sensor pipe was installed, very close to other joints, replacing the whole piece would be difficult, so I was hoping to be able to patch/seal it somehow.

Suggestions are greatly appreciated.