2
1
2
3
4
5
6
7
4
6
8
10
12
14
16
H
ea
d
Lo
ss
(F
t.)
Flow Rate (gpm)
Product Specifications
56
22"
1"
29"
5"
59”
8
Fig. 21: Side View
5"
11.5"
14"
21"
C
6
3
1
2
B
8"
6.5"
3.5"
5
4
7
1.
Primary supply, ø 1” NPT
2.
Primary drain valve connection, ø 1/2” NPT
3.
Domestic temperature/pressure relief valve (150
psi), ø 3/4” NPT
4.
Primary pressure relief valve (30 psi), ø 3/4” NPT
5.
Domestic cold water inlet, ø 3/4” NPT
6.
Domestic hot water outlet, ø 3/4” NPT
7.
Primary return & air vent, ø 1” NPT
8.
Gas connection, 3/4” NPT
Note:
Minimum allowable flow rate at full input:
PG-150- & PG PLUS-150
7 gpm
PG-199- & PG PLUS-199
10 gpm
