Dave at Mountain Maple asked me to beta test the Smart Sap Sucker (S3) this season. I was planning on trying out vacuum this year, so I worked his unit into my plans. I put the system into a plastic tote and I took pictures of the process.
Here's an exploded view of the 12v Shurflo 4088 and the valve he includes with the system.
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Here's a link to Mountain Maple's FB page with videos of the S3 in action.