Bending PEX tubing with heat involves carefully heating the tubing to make it pliable enough to shape. Here's how it's typically done:
-
Heat the area: Heat the section of PEX tubing you intend to bend to approximately 275°F (145°C). You'll notice the tubing starts to become translucent as it reaches this temperature. Caution: Avoid overheating, which can damage the PEX.
-
Use a Bending Jig/Form: Once heated, quickly place the PEX tubing over a bending jig or form that has the desired bend radius. This helps maintain the shape as the PEX cools and hardens.
Important Considerations:
-
Safety First: Always wear appropriate safety gear, including heat-resistant gloves, when working with heat. Work in a well-ventilated area.
-
Heat Source: Use a heat gun designed for this purpose, ensuring even heating. Avoid using an open flame, as this can scorch or damage the PEX.
-
Even Heating: Rotate the PEX tubing as you heat it to ensure even heating. This prevents weak spots and kinks in the bend.
-
Bending Radius: Be mindful of the minimum bending radius recommended for the specific type and size of PEX tubing you're using. Exceeding this limit can weaken the tubing.
-
Cooling: Allow the PEX to cool completely while it's held in the desired shape by the jig. This will help it retain its new form.
-
Alternatives: While heat bending is possible, using PEX bending tools like internal or external bending springs is generally recommended for achieving consistent results and preventing kinks, without using heat. These tools support the tubing wall during bending.
-
Professional Recommendation: PEX is known for it's flexibility and the usage of fittings to create the bends and angles you require. For larger bend radiuses, PEX can bend on it's own (as designed to do) without any assistance. Review PEX bending tools, or using PEX fittings, before resorting to a heating solution.
