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110891-02 -5/22
RSAH
Installation & Service Manual
C. TWO-PIPE OIL LINES
1. For two-piped systems, where more lift is
required, the two-stage fuel unit is
recommended. Table 6-2 (single-stage) and
Table 6-3 (two-stage) show allowable lift and
lengths of 3/8 inch and 1/2 inch OD tubing for
both suction and return lines. Refer to Figure
6-4.
Figure 6-4: Two-Pipe Installation
Lift "H"
(See Figure)
Maximum Length of Tubing
"H" + "R" (See Figure)
3/8 in. OD
Tubing (3 GPH)
1/2 in. OD
Tubing (3 GPH)
0'
84'
100'
1'
78'
100'
2'
73'
100'
3'
68'
100'
4'
63'
100'
5'
57'
100'
6'
52'
100'
7'
47'
100'
8'
42'
100'
9'
36'
100'
10'
31'
100'
11'
26'
100'
12'
21'
83'
13'
---
62'
14'
---
41'
Lift "H"
(See Figure)
Maximum Length of Tubing
"H" + "R" (See Figure)
3/8 in. OD
Tubing (3 GPH)
1/2 in. OD
Tubing (3 GPH)
0'
93'
100'
2'
85'
100'
4'
77'
100'
6'
69'
100'
8'
60'
100'
10'
52'
100'
12'
44'
100'
14'
36'
100'
16'
27'
100'
18'
---
76'
Table 6-2: Single Stage Units (3450 RPM)
Two Pipe Systems
Table 6-3: Two-Stage Units (3450 RPM)
Two Pipe Systems
6
Oil Piping
(continued)