Normally the spider gasket is a separate part, however your one may be different.
Look up the make of your MPV and check it out or Google...

Try posting here, as you are more likely to get a response since there was no reply since January

Your pump should be matched to your filter as excess flow through it will end up with poor filtration. So check the gallons per minute for your...

That is all the dead algae being vacuumed
It will get better, some people take weeks to get it right. Keep testing, brushing and chlorinating till...

That does seem normal, you probably have an algae bloom that is clogging your filter and you need to Slam
Let us have a complete list of numbers
How...

Thank you. I will let you know how it goes once I get and install the new filter.

i have same exact thing. is it normal ? did u call hayward?

Try posting on TFP a lot of people on there have replaced seals

Thank you so much this seemed to help

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You have posted this on TFP, I suggest you stay with it there as you are more likely to get a satisfactory resolution if you do as they say

Try using fibreglass

Generally NRV are used to prevent any water going back
Sometimes they may be used if a SWCG is installed after the filter to prevent freshly...

Was the replacement sand the correct size for your laterals
You probably didn't need to replace your sand