AquaPro

uPVC pipes, like other piping materials, undergo length changes as a result of temperature variations above and below the installation temperature. The extent of the expansion – expansion of piping material. The length of pipe between directional changes, and the temperature differential.

The coefficient of thermal expansion (Y) for uPVC is 3.1 × 10-5in./in./Fº. There are several ways to compensate for expansion and contraction. The most common methods are:

1. Expansion loops which consist of pipe and 90º elbows 
2. Piston type expansion joints* 
3. Flexible bends* 
4. Bellows and rubber expansion joints* 

*The manufacturers of these devices should be contacted to determine the suitability of their products for the specific application. Expansion loops are a simple and convenient way to compensate for expansion and contraction when there is sufficient space for the loop in the piping system.