Dual 12v pumps

Anybody on here run dual 12v pumps together. I have access to very cheap 12v pumps for $25 a Piece, there damaged goods as in scratched or missing accessories from shipping so going very cheap there 4gpm pumps. I have read on here a while back that someone tried it but couldn’t get it to work properly for some reason. Give me your opinions on dual setups and pros and cons.

I did it years ago . Wire both pumps to work off the same pressure switch . It worked fine until the pumps rotted out

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