Recirculation, Aqua plus, Product manual – Weil-McLain AQUA PLUS GL-E223-ADOC 0311 User Manual
Page 9
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AQUA PLUS
indirect
-
fired
water
heaters
— Product Manual
Recirculation
(continued)
Figure 4
Time lag to obtain hot water at fixture for branch lengths of 10 and 25 feet
(ASPE Domestic Water Heating Design Manual)
Time in seconds required to get hot water at fixture (from ASPE)
Fixture flow rate (GPM) -
0.5
1.5
2.5
4.0
Piping length (feet) -
10
25
10
25
10
25
10
25
Copper pipe
½”
25
63
8
21
5
13
3
8
¾”
48
119
16
40
10
24
6
15
Steel pipe
½”
63
157
21
52
13
31
8
20
¾”
91
228
30
76
18
46
11
28
CPVC pipe
½”
64
159
21
53
13
62
8
20
¾”
95
238
32
79
19
48
12
30
NOTE: Select branch size and length for less than 31 seconds delay.
Figure 5
Recirculation components
Part number GL-E223-ADOC 0311
9
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