Flying Pig wrote:

One other hint, also long-ago discussed here with Peggie, is that we very
aggressively flush with raw water after each use. That helps move any urine
products through the system, minimizing scale formation. We then also dry
pump aggressively to empty the pipe to the anti-siphon. PVC will take
muriatic acid and vinegar with aplomb (get your plomb here, folks, going
fast!), so we do that regularly, too. Of course, we have no proof, but I'd
bet a bunch that we have no scale in our pipes...

HTH

L8R

Skip



Thanks, Skip.
I'll take a look at it in that light...