My pool does not have the flapper that stops the leaves from coming back out of the waterline intake after the pump turns off. I believe the correct word for this flapper is 'weir'. question is - how hard is it to after-market install one? I see that there are two tabs ( bottom left and right ) of the intake area but could really use some assistance in what needs doing to get it sized and operating correctly.
As Always - thanks for your help.