Greenlee 851 PVC Heat Box Bender for 1/2in. to 4in. Conduit - Reconditioned - 851
Easy to use preheat for 10 minutes, open lid and position PVC, close lid, rotate until pliable, open lid, remove PVC and form bend
Bending tool features heavy-duty, insulated metal walls and cover with reflective interior for efficient, even heat
Full-length door for easy loading and unloading
On/off switch with indicator light
Sturdy wheels for easy mobility
Use two units in tandem to heat large sweep bends
Heats 50" long section of pipe
What our Experts Think
Q&A
Q: What is the Greenlee 851 PVC Heat Box Bender (Reconditioned)?
A: It is an industrial heating system designed to soften and bend 1/2" to 4" PVC conduit for electrical installation work.
Q: What is it used for?
A: It is used by electricians and contractors to create smooth, accurate bends in large-diameter PVC conduit for commercial and infrastructure wiring systems.
Q: How does it work?
A: The conduit is placed inside a heated box where controlled, even heat makes the PVC pliable enough to bend without cracking or collapsing.
Q: What conduit sizes does it support?
A: It supports 1/2 inch up to 4 inch PVC conduit, making it suitable for both small and large conduit runs.
Q: What are the key features?
A: It includes a large heated chamber, temperature control system, and a durable insulated housing for consistent heat distribution.
Q: Why use a heat box instead of manual heating?
A: It provides uniform heating, reduces risk of conduit damage, and ensures more precise and repeatable bends.
Q: Is it portable?
A: It is jobsite portable but heavy-duty, typically used in fixed work areas on construction sites or in fabrication zones.
Q: What power does it require?
A: It typically runs on industrial electrical power (often 120V/240V depending on configuration).
Q: Who uses this equipment?
A: It is used by professional electricians and contractors working on large-scale commercial and utility conduit installations.
Q: What does “reconditioned” mean?
A: It means the unit has been previously used and restored to working condition, though cosmetic wear may be present.
Q: Why is it preferred for large conduit work?
A: It allows safe, controlled heating of large PVC sections, which is difficult to achieve consistently with handheld heating methods.
Maintenance Tips
Damage 
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