Definition of a Function. A function is a relation for which each value from the set the first components of the ordered pairs is associated with exactly one value from the set of second components of the ordered pair. Okay, that is a mouth full.
Master cylinder without booster. Single bore master cylinders: These unboosted hydraulic Master Cylinders are actuated by foot effort, via the brake pedal. The brake pressure is related to actuation force and depends on the piston bore size: the smaller the bore, the higher the pressure.
My water pressure is less than 10 psi (7 or 8 psi). I wonder if I can run sprinkler valves without a booster pump. I read somewhere on internet that these valves need some pressure for proper operation, especially closing. By the way, I am going to use microirrigation (drip). 7 psi can run several small emitters without a problem according to emitter manuracturer's website. Any information would be much appreciated.