2
Determine which Gardian W51 heating cable
you need for pipe freeze protection:
Use the tables to the right to select the correct
heating cable. Add 1 foot to your pipe length for
each valve or spigot on your pipe system.
The charts assume the lowest outside temper-
ature is 0°F (–18°C), with a minimum of 1/2"
thick waterproof, fire-resistant thermal insulation
(preformed foam). For protection to –20°F
(–29°C), use 1" thick insulation.
Important
All thermal and design information provided
here is based upon a “standard installation”:
heating cable fastened to a pipe and thermally
insulated. For any other method of installation or
application, consult Tyco Thermal Controls at
(800) 545-6258.
Product selection charts for pipes
Electrical codes
Articles 422 and 427 of the National Electrical
Code (NEC), and Part 1, Section 62 of the
Canadian Electrical Code (CEC), govern the
installation of Gardian heating cable for pipe
freeze protection and must be followed.
Important:
For the Tyco Thermal Controls
warranty to be valid, you must comply with all
the requirements outlined in these guidelines.
All thermal and design information provided
here is based upon a “standard” installation
with heating cable fastened to an insulated
pipe. For any other application or method of
installation, consult Tyco Thermal Controls at
(800) 545-6258
General requirements for pipe freeze
protection:
• Gardian heating cables may be used on metal
and plastic water pipes but not on flexible
vinyl tubing (such as garden hoses).
• Gardian heating cables are not intended for
use
inside
any pipes, for freeze protection of
liquids other than water, or for use in classified
hazardous locations.
• Install with a minimum of 1/2" fire-resistant,
waterproof thermal insulation.
• Never use on any pipes that may exceed
150°F (65°C).
• Do not use an extension cord.
General instructions:
• Install only in accessible locations; do not
install behind walls or where the cable would
be hidden.
• Do not run the heating cable through walls,
ceilings, or floors.
• Connect only to ground-fault protected
outlets that have been installed in accordance
with all prevailing national and local codes
and standards and are protected from rain
and other water.
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10
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50
60
70
80
90
100
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50
60
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80
90
100
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Pipe length (ft)
Pipe diameter (in)
Pipe length (ft)
Pipe diameter (in)
18P
18P
6P
6P
6P
12P
12P
12P
18P
24P
24P
24P
18P
18P
6P
6P
6P
12P
12P
12P
18P
24P
24P
24P
50P
50P
50P
75P
75P
75P
100P
100P
100P
50P
50P
50P
75P
75P
75P
100P
100P
100P
Table 1 Metal Pipes
Table 2 Plastic Pipes
Add 1 foot to the pipe length for each valve or spigot on your pipe system. If cable selected is longer
than the pipe, spiral it evenly along the entire pipe.
Pipe Freeze Protection
