9
®
Link
Heat
General Repair and Testing
Kinked Tubing Repair
One of the most important features of PureLink® PEX-a crosslinked tubing is its shape
memory. As such, a kinked area can be repaired using the following procedure:
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Release system pressure.
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Straighten portion of tubing being repaired (do not squeeze with pliers).
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Using a heat gun, heat area to approximately 260°F (125°C), or until tubing appears clear.
(Do Not Use an Open Flame.)
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Let the tubing cool undisturbed at room temperature.
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Repair is now complete.
Pressure Testing
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Once the plumbing rough-in is complete, it must be pressure tested. HeatLink® 1⁄2", 3⁄4",
1", 11⁄4", 11⁄2", and 2" plugs are available.
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An appropriate test kit must be connected to the system including a pressure gauge for
monitoring.
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Test requirements specified in your local building and plumbing codes must always be
followed.
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Cold water or air may be used for testing. (If allowed by local codes)
Note: Be aware of how temperature can affect air tests. Rising air temperature increases
pressure, falling air temperature decreases pressure.
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Test to at least 50 psi above operating pressure, up to 120 psi.
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HeatLink recommends a test duration of 24 hours.
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When using leak detection solutions, ensure they are approved for use with PEX and HPP
fittings.
Tubing Repair
If tubing is damaged during installation it can be repaired using the appropriate sized
coupling. Repairs in concrete require the fitting assembly to be appropriately wrapped to
protect assembly from concrete; HPP couplings are recommended for concrete repairs.
Thawing Frozen Tubing
PureLink® PEX-a tubing can withstand freeze-thaw cycles better than most other products
available for plumbing today. While not freeze proof, PureLink® tubing is resistant to freeze
damage.
Should tubing become blocked due to freezing, HeatLink recommends thawing by using
hot water, hot towels or gently heating with a heat gun.
Do Not Use an Open Flame!
