Manhole Rehabilitation Project - Arizona | Hybrid PVC Manhole System by Geneva Pipe and Precast

In Surprise, Arizona, an hour northwest of Phoenix, Arizona, Geneva Pipe and Precast partnered with CPM Pipelines to rehabilitate two concrete manholes utilizing our Hybrid PVC Manhole System. These manholes are downstream from a 24-inch force main discharge point, a high-flow area in the sanitary sewer system where caustic hydrogen sulfide (H2S) gases are prevalent. The constant H2S exposure makes these structures particularly susceptible to microbiologically influenced corrosion (MIC), resulting in accelerated concrete decay and severe degradation.

The City of Surprise considered several options for rehabilitating these structures, including epoxy coating. However, given the severity of the degradation, an epoxy coating would only provide a temporary solution with an estimated service life of less than five years. Furthermore, installing epoxy coating involves multiple steps, which may include pressure washing and applying new grout, and can take up to three days for a single manhole.

Our Hybrid PVC Manhole System, on the other hand, offers a permanent structural rehabilitation method that can be completed quickly and economically. It was selected as the optimal rehabilitation method for this project for its easy-to-install design, watertight and corrosion-resistant components, and long-lasting performance guarantee, which includes a 50-year warranty against corrosion and 100-year design life.

Learn more about the Hybrid PVC Manhole System:
https://www.nwpipe.com/products/lined...