What is the most common cause for pipe joint failure (leaking) in newly laid pipe?

The most common cause for pipe joint failure in newly laid pipe is often due to not having the joint completely clean. When dirt, debris, or other contaminants are present at the joint surface, they can interfere with the proper seal between the two pipe sections. This can prevent the gasket or joint material from forming a tight and effective seal, leading to leaking. Ensuring that the surfaces are clean is critical for achieving the intended performance and longevity of the joint.

While other factors such as the proper insertion of spigot ends into the bell and maintaining the correct trench bedding angle are also important, cleanliness directly impacts the immediate ability for the joint to seal effectively upon installation. Proper preparation of the joint surfaces is a fundamental practice in plumbing and pipeline installation.