Potter Releasing Systems - Manual (Page 12)

12
Water Supply and Distribution Symbols
Mains/Pipe/Valves
Referent (Synonym) Symbol Comments
water main under building indicate pipe size
suction main indicate pipe size
post indicator and valve indicate valve size
key operated valve indicate valve size
os & y valve (outside screw
and yoke, rising system)
indicating butterfly valve indicate valve size
non-indicating valve
(non-rising stem valve)
valve in pit indicate valve size
check valve indicate valve size