CV spouts or CV spout adapters?

[DocsMapleSyrup]

Thanks for the answered questions, now I have probably a very stupid question. What is a cv2 spout vs a cv1?

[DrTimPerkins]

Thanks for the answered questions, now I have probably a very stupid question. What is a cv2 spout vs a cv1?

CV1 = CV Spout Adapter (requires a stub spout), black, nylon....the original CV
CV2 = CV Spout, one-piece, clear, polycarbonate (no stub spout needed)
CV3 = CV Spout Adapter (requires a stub spout), clear, polycarbonate

[markcasper]

CV1 = CV Spout Adapter (requires a stub spout), black, nylon....the original CV
CV2 = CV Spout, one-piece, clear, polycarbonate (no stub spout needed)
CV3 = CV Spout Adapter (requires a stub spout), clear, polycarbonate

Since the subject is alive.....is there anything happening with the check valve connectors at the mainline entrance? I heard it mentioned a year or two ago and can't seem to find any info. on it. It basically was a built in check valve within a 5/16 connecter designed to aid in stopping sap from flowing backwards in a lateral from the mainline, since that is where the "energy" comes from. I thought when I first heard it, why someone hadn't thought of it sooner? How many times have we all seen sap traveling backwards because of a releaser malfunction, frozen spot in the line, etc.? I believe reading how this one checkvalve at a mainline entrance would cut down on the need for a checkvalve on every spout.

[sapmaple]

I was able to try both clear adapters one with ball and ones without and found you do not want to pound them in the tree to far and their is a circular line on the adapter, tap the stubby up to that line then they come apart decent but further in and they do come apart hard also if the tree is running sap when your tapping they really go together easy so have to be even more careful I'm putting in over 9000 this year so hope I don't regret it when comes time to take apart. That being said Wish Leader would make a polycarbonate stubby

I think they expected them earlier, but for some reason (unknown to me), they didn’t get them out until later. We too got them late. Only were able to get a hundred or so out to test as we had already tapped our woods.

[DocsMapleSyrup]

Thanks for the clarification Dr. Tim! Much appreciated.

[DrTimPerkins]

Grabbed a sample of each of the various types of Leader CV spouts and adapters at the NY Maple Conference yesterday.
CV styles.jpg
Clockwise from top left,
Original CV Spout Adapter = CV1 (requires stub spout), black, nylon, ball near stub connection
Clear CV Spout Adapter = CV3 (requires stub spout), clear, polycarbonate, ball in tip
CV Spout = CV4, clear, polycarbonate with 3/16" tubing fitting, ball in tip
CV Spout = CV2, clear, polycarbonate with 5/16" tubing fitting, ball in tip

Hope that helps to clear up any confusion about what the various styles are.

[DrTimPerkins]

Since the subject is alive.....is there anything happening with the check valve connectors at the mainline entrance?

I think Steve Childs has done some research on this, both back early on when the CV first came out, and then a bit more recently. I did quite a lot of testing of various types of commercial check-valves in-line during the development and testing of the CV spout concept. Most of them created some amount of back-pressure which resulted in some loss of yield. That is why the CV spout/spout adapter incorporates a very lightweight ball for operation rather than something spring-loaded or of a diaphragm-type. Steve may have found something different. There is no question that a properly designed and incorporated CV would reduce back-flow of sap on that lateral line. We actually considered that approach, however you would still get backflow to any trees on that line if you had a leak AFTER the CV, and you would have some small amount of backflow occurring with each freeze cycle, thus the thought was to get them as close to the taphole as possible to prevent both those possibilities. I'd have to go back and look at the patent as granted to be sure, but I believe we tried to incorporate the concept of using of a CV to reduce backflow anywhere in the lateral line/dropline/spout system in the filing. So basically any existing commercial check-valve existing that was not specifically made for maple tubing could be used in that way, but anything specifically developed for the maple industry would fall under our patent.

[markcasper]

Thank-you for the update, Tim! Your a maple News on the net.

[BlueberryHill]

Great info in this thread, thank you! I have drops that are a few years old and there are CV2's still on them that I used last year. I see that Lapierre makes a clear adapter that is 5/16 on both ends. Would these CV2's plug right into that adapter? This seems like a good way to save money (1/2 price) vs buying new CV2's and will also be easier to install since I wont have to cut off the old spouts and crimp on new ones.

The main questions being 1) Will the CV2's fit these adapters and 2) Will this "system" give me similar sap yields? If it's the 1-2% "stubby effect" that was discussed above then that would be worth it. But if I will be missing out on a lot of sap then I'll just do new CV2's again. What do you guys think?

[BlueberryHill]

bumping this to the top to see if anyone knows if this would work??