After testing the check valve by putting it in backwards. I realized it is holding washer fluid and not leaking. I also put a zip tie or hose clamp on all the hose connects down stream of the check valve. Which made little difference in stopping the leak.
I’ve heard a number of people have had this issue. I think it’s a design flaw more than anything. There’s about two feet of hose down stream of the check valve & spray nozzle. So any air can get into the hose and cause the washer fluid to leak out.
I put in a 1/8” check valve just before the spray nozzle. The zip ties on the connections might be a bit overkill. I have yet to test it by taking it for a ride. But if it leaks now I’m draining the washer fluid reservoir all together.
