[Leoreh]

Hello,
I have a 500 psi pump [pump tec ] I think ..when I turn it off .. then back on I have to prime it before ill work ,
any ideas don't think ..theres any loss in pressure

[Kinver_Clean]

These pumps being an induction motor not a brushed motor will not start under load.
All pressure remaining in the system must be released before starting. Open the wand/tool valve and then start.