We have a large sediment filter (sand), 20gpm 14"x 54" tank, that filters everything coming out of the well. Apparently the media (sand/garnet/zeolite) is supposed to be changed every five years. I never knew. Certainly beats changing the usual 9" cartridges, which we have to prefilter water into our RO unit. The filter water then has a secondary settling time in twin 5000 gallon tanks, before being used.
It is looking like we will pull the pump to replace the leaking foot valve and replace the pump while it is out, and at the same time replace the media in the sediment filter and service the Fleck 1500 valve on the filter.
We are considering using zeolite (Filter-AG plus / clinoptilolite) instead of sand for better filtering. Anyone use it?
More when I have more details...
All the best,
Peter