Profile: CP Test Services, Inc. is a manufacturer of access and security covers. Our cathodic protection test stations range CP test is committed to develop & manufacture a wide range of underground access products and post-mounted cathodic test station products. Our tracer wires are connected to a combination cast iron and ABS tamper proof tracer wire access box. Our CP test-Valco manufacture grey cast iron manhole covers, manhole frames, manhole cover keys and manhole riser rings.