What is the minimum cure time for 1-1/4" CPVC pipe if the pressure test is set to 100 psi at an ambient temperature of 48 degrees?

The minimum cure time for 1-1/4" CPVC (Chlorinated Polyvinyl Chloride) pipe is important to ensure that the joints are adequately set before applying any pressure. At an ambient temperature of 48 degrees Fahrenheit, the curing process can take longer than it would at warmer temperatures.

Currently, it is recommended that the joint be allowed to cure for at least 30 minutes before a pressure test is applied. This timeframe provides sufficient time for the solvent cement used in joining the CPVC pipes to properly bond, ensuring a robust and leak-free connection when pressure is introduced.

While shorter cure times may be sufficient in warmer conditions, the cooler temperature in this scenario necessitates adhering to the 30-minute guidance to maintain the integrity of the joint under pressure. The other options extend the time beyond what is typically necessary under these conditions, which may lead to unnecessary delays without added safety benefits.