I need some help ordering the right parts for my multiport valve. I've got a Purex-Triton TR-60 sand filter with a Purex-Triton multiport valve. The only numbers I could find on the valve that look like a part number are: 27-3200, but it might be 27-3288, cause there's a scratch that partially obscures the numbers. I'm looking to rebuild the valve, because it allows the filter to drain into the pool when the pump is shut off. After looking online, I can't seem to find anything that comes close to those numbers. Can anyone here give me some help to find the right parts? I don't have a pool store around here, so I need to order everything online, and sometimes returning stuff is a pain.