A. With a stop cock between the boiler and check valve.
Q. Does a man-hole in the top shell of boiler weaken it?
A. Yes, to a certain extent.
Q. How many valves in a common plunger pump?
A. Two, a receiving and a discharge valve.
Q. How are they situated?
A. One at suction, the other at discharge end.
Q. How do you find the proper size of safety valve for boiler?
A. Two square feet of grate surface is allowed for one inch area of common lever valve, or three square feet of surface to one inch area of spring valve.