Hayward S311SX or S360SX?

[Diesel_24]

Hi, The label for my Hayward blew off at the model & serial number before we moved in 6 years ago. I need to change the sand and want to replace the laterals. The pool was installed in 2010. Can anyone by looking at the picture's identify if it's a S311SX or a S360SX? Also, this is the first sand filter I've owned. I also want to replace the the bottom elbow assembly, how does that come apart? Do I have to disconnect it from the outside of the filter? Thanks

 

[ajw22]

Attached is the manual for your filter.

See if these measurements tell you which you have. The S311 is smaller then the S360

 

[proavia]

Measure the filter diameter - side to side.
36" = S360SX
31" = S311SX

 

[Diesel_24]

Found this, it's about 43", S311. It doesn't look like it can hold 700lbs. of sand. Thanks for the help. Does anyone know how that bottom elbow attaches to the bottom input?