CVPC pipe was developed in the 1980s and has proven to be more durable, safer and easier to install, and longer lasting than the PVC pipe of before. PLLC and assembled into this document. If the system is not properly planned or installed, the pipe could fail. This CPVC Pipe Failure Investigation demonstrates these shortcomings. Most North American PVC pipe uses a Nominal Pipe Size (NPS), while CPVC is available in either NPS standard sizing -OR- CTS (Copper Tube Size) sizing. After review of the facility, collection of samples, and extended discussion, the samples were returned to Coengineers lab for analysis. In 2008, as an attempt to rebound dropping sales, SPF manufactures formed the SPF Alliance (SPFA) to prove SPF and CPVC piping were compatible. David Coles, PE, Coles Consultants, LLC assisted with the overview of system operations and best installation practices. Advantages of CPVC. CPVC pipes share many of the advantages of PVC, plus one more: Longevity: Like PVC, since CPVC is a plastic material, it does not react to corrosive substances and does not rust, so its lifespan is indefinite. Taken together, these observations would explain how excess oxygen was allowed to enter the system. A major concern related to pipes and fittings is the potential for damage when they fail and leak. Make-up water PRV set incorrectly: Having to vent air continuously from the system indicates that the make-up water PRV (pressure reducing valve) was not set correctly to prevent air entrainment. When plumbing began to move indoors in the early 20th century, the materials of choice were terra-cotta, cast iron, copper and galvanized steel. Ferran Services & Contracting uses it on a regular basis. Classic environmental stress fracturing was found at the inside wall of the threaded area of pipe. A pile of samples were salvaged from the demo and laid out on the floor by the contractor for our review. It was our recommendation to replace the entire CPVC system with an “Engineered System” that is specified from beginning to end to perform the function of a modern and reliable hydronic heating and cooling system. The Architectural building specifications did not make it clear to engineering what material would be used for the piping of the hydronic system. With over a decade of experience performing failure analysis investigations on orange plastic (CPVC) fire sprinkler piping systems. The second observation strongly suggests that the system was contaminated at some time in its past with a chemical or agent known to degrade CPVC. It appears more likely than not, that this system experienced two system-wide deficiencies. PEX tubing, PVC pipe, and CPVC pipe marked “NSF-61” or “NSF-PW” indicate that they have passed testing for potentially harmful chemicals leaching into the water. Don’t confuse CPVC pipe with the plastic polybutylene systems that were a problem more than a decade ago. Plastic pipe failures can lead to water damage, mold, and hundreds-of-thousands of dollars in repairs! We were looking for evidence of multiple failure scenarios offered by the owners, including a reported lightning strike event. However, as with all plumbing products including metal piping, occasionally a pipe or fitting may fail. You can do this by checking the color of the pipe: CPVC is a gold/yellow/tan color, whereas Schedule 40 PVC plumbing pipe is a dull white. Additional tests would need to be carried out for more specific diagnostic. The first may be described as the general disregard for manufacturer installation recommendations. CPVC pipe is non‐toxic. The following chart shows a box rendering of the building elevation identified by suite numbers and approximate costs of recent repairs (as a proxy for severity of the leak). The scope of my search is only fire sprinkler systems and only CPVC pipe failures in the US. The objective of the investigation was to determine how and why such a recent installation could become problematic and, if possible, determine root cause for systemic failures. Generalized Failure to meet manufacturer installation requirements: Manufacturers requirements for supports were every 3 feet for up to one-inch diameter and every 4 feet for pipe 1 ¼ to 2 inches in diameter. Coengineers collected all data. Abrasion resistance: Abrasions occur when tough, jagged materials come in contact with the pipe wall in underground installations. In the absence of this specification, the builder or sub-contractor took it upon himself or herself to use an otherwise reliable industry standard such as CPVC piping product. The Dos and Don’ts of Gluing PVC Pipe Speed and accuracy count when gluing PVC pipe, so avoid mishaps with this guide to creating an airtight connection with fast-acting cement. 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