3
SELECTION
To choose the right length of pipe freeze protection cable, make sure the heating
cable is long enough to run along the bottom of horizontal pipes and either side of
vertical pipes (including valves) without crossing or spiralling. Never use a cable
longer than the pipe you are protecting.
1
CABLE LENGTH
The cable should be applied straight along the pipe and can protect pipes up to
1 ½ in. (38 mm) in diameter.
For pipe lengths other than standard heating cable sizes and over ¼ in. (6.4 mm)
in diameter, use two heating cables in parallel on opposite sides of the pipe (see
illustration below). The maximum overrun in the middle of the pipe should not exceed
3 ft (90 cm).
Do not install on pipes shorter than 3 ft (90 cm) long.
2
CABLE INSTALLATION
To protect standard length pipes with a standard length of heating cable, apply the
cable straight along the bottom of horizontal pipes or either side of vertical pipes
following installation instructions.
For non-standard length pipes that are
3
∕
8
to ¾ in. (9.5 to 19 mm) in diameter, the
cable can be up to 1 ft (30 cm) shorter than the pipe. For non-standard lengths that
are 1 to 1 ½ in. (25 to 38 mm) in diameter, use two separate cables and overrun
them on opposite sides of the pipe, starting from opposite ends following installation
instructions.
The maximum overrun in the middle of the pipe should not exceed 3 ft (90 cm).
