Munchkin VWH High Efficiency Hot Water Supply Boiler Installation & Operating Instructions Manual page 20

PIPING ILLUSTRATIONS
Piping Symbol Legend
circulator (open loop)
(w/ isolation flanges)
flow switch
gate valve
globe valve
ball valve
swing-check valve
spring-loaded check valve
hose bib / boiler drain
diaphragm-type
expansion tank
(for potable water)
Munchkin heater
Fig. 5-1
20
anti-scald rated
mixing valve
pressure gauge
pressure relief valve
(or P&T relief valve)
temperature /
pressure gauge
T/P
union
vacuum breaker
Superstor Ultra
Storage Tank
PIPING