Pennsylvania Statutes Title 53 P.S. Municipal and Quasi-Municipal Corporations § 15323. Persons or corporations not engaged in plumbing business;  restrictions as to license

No person, firm, or corporation, not directly engaged in the trade or business of plumbing, shall engage in the said business, trade or work by himself, itself, employe, or by any other means attempt to engage in the said plumbing work, or business of plumbing.  No member of a firm of three or more persons or a corporation can engage in or continue in the plumbing trade, unless one member is a certified licensed master plumber and a second member of the said firm or corporation possesses a license as a master plumber.

Should a certified master plumber or a licensed master plumber member of the firm or corporation die, become incapacitated, or sever his connection with the business, the business can be continued during the process of administration for a period of not exceeding one year;  providing the necessary steps are taken satisfactory to the Board of Plumbing Supervision of the Department of Health to admit another master plumber, qualified as above provided for, as a member of the said firm or corporation:  Provided, That a certified licensed master plumber, approved by the Board of Plumbing Supervision of the Department of Health, during this interim of administration, supervises all work and assumes full responsibility therefor:  And provided further, That municipal authorities shall be permitted to employ a licensed plumber for the repairing of plumbing in municipal buildings.