Hi all -
after backwashing yesterday, I notice that my multiport was behaving unusually. At my final rinse, I notice that my falls were running while the mpv was in rinse. I check at backwash, and it did the same, and if I run it with the valve at filter or recirc, I lose some water down the waste.
I presume a spider gasket will restore proper function? Do I lube it when replacing?