@For Science! Thanks, also, i prefer to use them in parallel as a second that automatically rotates which pump is working after a period of time via an arduino mega, because since i have to make way long mechanical simulations of designed parts, which are very complex and can take days long, so i need the system so it can rotate the pumps so they dont die in the middle of the simulation, and also to detect if one fails so it can intermediately switch to the other one and close the dead loop so it doesn't looses pressure