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Address: Allen, TX 75013 Phone: 469-663-9957 Old Stone Plumbing Co is a professional plumbing company based in Allen, TX, serving the surrounding areas with top-quality plumbing services. Our team of experienced plumbers is dedicated to providing reliable and efficient plumbing solutions for all your needs. Business Hours: M-F: 6am to 9pm Sat: 8am to 10pm