Today after being unsatisfied with filter performance I decided to check the sand level in the filter. Unfortunately I could not get the multiport valve to unscrew from the top of the filter. I first tried counter clockwise but it would not budge one bit. I was putting so much force on it I was worried I was going to break the port openings off. I even tried counter clockwise a few times but still no movement whatsoever.
As you can see my filter housing is also two pieces that are bolted together. Am I doing this properly? Is the multiport perhaps glued in and the filter needs to be opened by unbolting the two halves? That seems like it would cause sand to go everwhere.