In article efk%f.8402$8g3.2124@trnddc02,
James Sweet wrote:


How much does it cost to just replace the filter unit? I'm all for
fixing something but if it comes down to this extreme, and modern
versions are readily available then why?

Everything is relative. The OP wrote:

Replacing the sand filter would not only be pricey, but labor
intensive.

I guess he's the only one in a position to evaluate the pros and cons of
repair or replacement.