Hey all,

I've tried multiple ways to create a decent vacuum system without success. I've seen many different types of Shurflo pumps for around or under $100 on the internet, but I have tons of questions.

These are basically RV water pumps. Are they capable of pulling decent vacuum?

Can they run all day without burning up?

I've seen some posts indicating they shut down when the sap freezes and start again when it starts to run, how does this work?

Lastly, there are DC and 115V AC models. Is one type better than another.

Thanks in advance for your feedback.