Ok the filter was put together when I purchase it.I did check the laterals before I added the filter sand.As far as the 6 - way vale I don't know,was already put together when it came in the mail.the only thing I did was to hook up the pump.I attached the hose pump to the pump outlet on the sand filter.it say pump.and attached the return to the return.I added 200 lbs of filter sand and did notice that I did get a little sand in the view bottle.so I did take out a little sand.Everthing is fine,just can't vacuum for more than three mins,that is when I notice nothing comming in through the return jet.
Guess I'll have to call a pool company.As I know nothing about equipment.
thanks

__________________