Leaking backwash hose.

Good day. Just getting my pool ready and seem to have a leaking backwash hose, in both filter and bypass. From what I've read that would indicate a spider gasket problem? Can anyone help me get the right thing by telling me which number on the list I need? Or which part number or something to help.

Parts for Sta-Rite Top Mount Valve Parts, Pentair Multiport, Swimming Pool Valve Parts

Also, the hole where I screw the pressure gauge has a small crack. I've ignored it for 3 years now, but just wondering if I could get this to solve both problems at once?

StaRite WC112 Multiport Valve Plug and Cover Assembly, 77704-0104

Thanks for all your help.
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