I have a big oval Doughboy above ground pool. The deck is built around it, and most of the plumbing is under the deck. My pool has two returns, one on the bottom on the deep end, and one on the side. Pretty standard.
There is a Hayward Dial-A-F....(something, the sticker is torn there) valve where I can choose to from 4 different settings: A - (sucks in water from the top return only,} B: (bottom only) A+B (both) and "Off"
It has a leak. Looking at this illustration, http://www.poolcenter.com/parts_valves_hay_sp732.htm (which I found via Google images. I know nothing about that site) the crack is in #4, the cover.
But I can't find a model number on my valve. Would this be a 3-way, even though there are actually 4 positions?