I have sand sand coming in the bottom of my pool. It was getting better, but now seems like it has turned and worsened. I replaced the sand earlier this year and inspected the laterals. All looked fine. Could the multi port valve need replacing? Water is filling in the pressure valve. What other troubleshooting would help?
The issue is usually the spider gasket if the laterals and standpipe are ok. It looks like you have the Hayward Sp0714T valve. You could replace the upper handle assembly. That would correct any problems with the valve. The part number for the upper assembly is 4703-20.