Richard L. Allen, company President, has been in business since 1984. Master Plumber License #M14517. We employ licensed plumbers, medical gas endorsed, and licensed apprentices. R L Allen Plumbing Co. Inc. has established itself as a leading and reliable provider of plumbing services for the Dallas / Ft. Worth Metroplex, TX area. We employ knowledgeable, licensed plumbers to ensure that work is done right the first time.