What is the purpose of expansion fittings in PVC conduit systems?

The purpose of expansion fittings in PVC conduit systems is to allow for movement due to temperature changes. PVC, like other materials, expands and contracts with temperature fluctuations. If there is no allowance for this movement, the conduit can become stressed, leading to cracking, warping, or even displacement of the conduit connections. Expansion fittings are specifically designed to accommodate these changes, ensuring that the integrity of the conduit system is maintained under varying temperature conditions. This flexibility is crucial for the long-term reliability and performance of the installation.

While preventing cracking and reinforcing connections are important considerations in conduit systems, they are not the primary function of expansion fittings. Aesthetics, while relevant in some contexts, do not pertain to the utility of expansion fittings in determining how the system manages temperature-related expansions and contractions.