With in the past couple of weeks, i was given a whole pool with all the accesories that you could get, the sand filter that came with it is by Muskin leisure products. I have been looking online for any type of information on it but i have come up with nothing. There in no model# on it or serial#, nothing at all except for the sticker on the front that reads

DYNA SAND
sand filtering system

with the basic info on how to filter your pool. I do not know how old it is or anything. I hope someone out there can help me!!!!