Anyone know the first year for automatic sani-dumps on Newell's

[Chipper]

I like the idea of the automatic sani-dump feature and wondering the first years they became standard or optional on Newell's? Thank you.

[Neweller]

Chip, I had owned a 1986 Newell and it had the automatic sani-dump valve. It was factory installed. I don't know if it was original equipment or installed later.

[Chipper]

Can you tell if the sani-dumps are electric or air actuated? Thanks again.