Disclaimer The State Board of Examiners of Plumbing, Heating, and Fire Sprinkler Contractors the Board has made every effort to insure the accuracy of the .Best People. Best Practices. PHCC gives plumbing and HVACR contractors the resources they need to be the best Proven tools for running efficient, profitable .The Contractors State License Board CSLB protects California consumers by licensing and regulating the state’s construction industry. CSLB was established in .The Trade Body For Quality Plumbing and Heating Contractors APCH Ltd. Representing Large Companies to Sole Traders. Join Today.