Guzzler pump problems

[Crik]

It seems that I have fixed the issue by swapping out the umbrella valves with duckbill valves. I ran it yesterday without issues.
Tell me if this makes sense to all of you. I have 100 taps on this system. With the umbrella valves it was pulling 25-30 inches of vacuum when working right (before I had the backing up issues). With the duckbill valves the best I can get is 16 inches of vacuum but there is no backing up in the mainline. So is it correct to assume that you will always get more vacuum with the umbrella valves but they need more sap to operate properly? And you will not get as much vacuum with the duckbill valves but they will work better with less sap? Thoughts?

[Biz]

Bosworth pumps that are set up for maple sap applications all have umbrella valves as standard, I believe because they are more efficient at producing vacuum. Interesting that you are actually seeing better flow with the duckbill valves.

Dave

[NhShaun]

Bosworth pumps that are set up for maple sap applications all have umbrella valves as standard, I believe because they are more efficient at producing vacuum. Interesting that you are actually seeing better flow with the duckbill valves.

Dave

Does that mean the duckbill valves would be better for using the guzzler as a transfer pump rather than a vacuum pump? I'm having issues with mine and perhaps swapping those out may help.