Pressure Testing At PREVCO USA we currently have three pressure testing chambers where we conduct our own in-house testing and pressure testing for outside clients. The smaller of the three chambers can test underwater housings up to 10,000psi and can accommodate vessels with maximum diameters of 8.5” by 30” in length. The medium sized chamber will accommodate up to 17” diameter and 8’ in length up to a pressure of 2,675psi. The new larger chamber has an ID of 24'' and length of 120'' and can pressure test up to 15,000psi. The PREVCO standard test is for two 10 minute holds and one, one hour hold. Depending on size, it is possible to test several items together in a batch.