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The Chemical Breakdown of Poly B Pipes
One of the most significant problems with Poly B pipes is their susceptibility to chemical degradation. Exposure to certain chemicals, particularly chlorine, can weaken the pipe walls over time, leading to leaks, bursts, and even complete pipe failure. This degradation process is accelerated by factors such as high water temperatures, UV exposure, and the presence of certain minerals in the water.

Chlorine’s Devastating Effect
Chlorine is a common disinfectant used in municipal water systems to kill bacteria and viruses. While essential for public health, chlorine can have a detrimental effect on Poly B pipes. Even at low concentrations, chlorine can gradually break down the chemical bonds in the pipe material, making it brittle and prone to cracking. Over time, this can lead to pinhole leaks, which can be difficult to detect and often result in significant water damage.

Other Chemical Culprits
Besides chlorine, other chemicals found in water, such as sulfides and chloramines, can also contribute to Poly B pipe degradation. These chemicals can react with the pipe material, causing it to become brittle and susceptible to failure. The presence of certain minerals, like iron and manganese, can also accelerate the degradation process by forming deposits that restrict water flow and increase stress on the pipe walls.

Physical Degradation and Stress Cracks
Poly B pipes are also susceptible to physical degradation and stress cracks. Their flexible nature, while initially advantageous, can become a liability over time. Repeated bending, flexing, and expansion and contraction due to temperature changes can weaken the pipe walls and lead to cracks. These cracks can start small and may not be immediately noticeable, but they can gradually enlarge, eventually leading to leaks and pipe failure.