A pressure balancing arrangement that prevents the boiler pressure from forcing boiler water into the return lines is called a:
a. Relief valve
b. Check valve
c. Pipe siphon
d. Back-flow preventer
e. Hartford loop
Answer: E
A pressure balancing arrangement that prevents the boiler pressure from forcing boiler water into the return lines is called a:
a. Relief valve
b. Check valve
c. Pipe siphon
d. Back-flow preventer
e. Hartford loop
Answer: E