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Closed Type Expansion Tank
Drain Cock
Pressure Relief Valve
R
Figure 16.
(b) Piping connections with diaphragm expansion tank--- See Figure 17.
The cold water feed to the pressure reducing fill valve may be piped with 1/2
inch pipe.
Supply
to
System
Shutoff Valve
Fill Valve
Cold Water Feed
Return From System
Circulation Pump
S
3/4 in.
Shutoff Valve
Auto Air Vent
Cold Water Feed
Pur
g
e
r
S
Diaphragm Type
Ex
p
ansion Tan
k
R
Drain Coc
k
Circulator Pum
p
Figure 17.
Installation, Operation, And Service Instructions 23