Swung over to the PS to ask their opinion on the pump running without back pressure, (they were thinking I probably shortened the life -but to run it till it dies) and after mentioning that I had the Mars HP Pressure Side Cleaner, he, as an aside mentioned that it's been discontinued. _sort of irked me as I just, this season opened the pool, got a brand new/ but obsolete unit -c'est la vie I guess.
I quite imagine that parts for this will become difficult to get in the near future, if not already. I went ahead and ordered a new set of tires, hopefully they will be able to get them.
If you have one of these, you may want to consider the same, or at least be aware that parts may well become more scarce as time goes on.