[ol'George]

Originally Posted by CubbyRI

Cool thanks. What does the relief valve do?

also, Im liking this design, only 2 cylinders needed, and can buy plans too

https://www.loaderplans.com/order-ca...nd-loader#mini

A pressure relief valve keeps the desired pressure in the system.
Without one, there is nothing to control the pressure causing things to break,
like hoses, lines, pumps, etc.
Much like the pressure regulator on a propane grill, or an air compressor.