Brittleness and Weakness
The PVC pipe should only be heated to the point where the pipe becomes soft enough to bend it in the desired shape. The pipe diameter should not be reduced or crushed.
The exterior of the pipe should absolutely show no sign that the pipe was heated. There should be no discoloration, burning or melting of the plastic.
|Burnt PVC swimming pool pipes|
Burnt areas of PVC pipes become very brittle and weak. These areas are susceptible to decay and breakage.
I don't have to tell you the havoc that can be wreaked upon a swimming pool, hillside slope or pool deck if there are plumbing leaks under or within the concrete structures. Plus, they are not easy to repair. The long lasting damage to the pool, property, soils and site are oftentimes irreparable.
Using pipe ovens or heat blankets instead of propane torches are temperature controlled methods of heating PVC pipes and conduits.
Failing to keep a torch moving causes burned and scorching of the plastic. Even a building inspector with a pea brain will reject any burn pipe that they observe.
Don't risk your project to brittle pipes - insist that they be replaced before they are "set in concrete."
Paolo Benedetti, SWD, Principal
Aquatic Technology Pool and Spa
International Swimming Pool Consulting and Design, Aquatic Consulting, Watershape Consultants, Expert Witness, Hydraulic Design, Landscape Architecture, Construction Management
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