A check valve is a novel idea! thumbs_up
I just Googled and looked at them on JEGS website.
They were 10 bucks for a package of 2. I don't know if cheaper anywhere else, but compared to bleeding brakes the way I've always had to do it... I'd spring for $20!
Thanks for bringing this up, Curt!
Jerry

1959 Chevy Apache 3200 Stepside
In the Stovebolt Gallery
Restoration Journal on Facebook

"A government that robs Peter to pay Paul can always depend on the support of Paul." ~ George Bernard Shaw