I'm finally redoing my inground pool (badly cracked concrete deck) and decided to fix my sand filter since I was getting sand in the pool. The laterals look "ok" but the top of the center pipe is cracked. I decided to change the whole assembly to start fresh. Thing is, the sticker on my filter is long gone and I can't see any numbers stamped on it. The top valve number is SP714 TC, but seems like that could fit a few filters and it's the filter model that dictates the center pipe assembly model, right? Any specs I could use to measure the filter dimensions and find the model that way?