Sisters pool with a non-standard return system that has multiple returns on the bottom of the pool along with two on the front near the steps in the shallow end. All the returns on the bottom have individual runs that terminate at this diffuser? beside the pump. These are returns, not drains and are always on with no valves to change flow between the two returns on the side and six on the bottom. I've put two pics up on photobucket and here are the links to them:
http://i1128.photobucket.com/albums/m48 ... stery2.jpg
http://i1128.photobucket.com/albums/m48 ... stery1.jpg
The top on this creature has cracked (she has it coated in gorilla glue so she can run the pool as evidenced in second picture). Can't find a new top at the local pool emporiums and no one even has a clue what it is / who made it for us to try to find one online.