Originally Posted by maxifire
I would like to bring to your attention to this particular O ring that I have troubles with - AS568A Dash Number 021 O-Ring
021 is one of the two rings that separate the high pressure side from the low pressure side in the pump. It worked in mine. We're all in uncharted waters here so you'll just have to test it.
I measured where the 021 ring goes with a micrometer
But if you wanted to go for a thicker o-ring to test instead of the -021 AS568A Dash Number 119
would be what you'd want to order.
Let us all know how it goes either way.