About Mathews Plumbing is on of Southeast Idaho's largest and most reputable plumbing companies. Mathews Plumbing opened for business over 50 years ago ; founded on the principles of honesty, integrity and hard work. Mathews Plumbing and Heating is located in Shelley, Idaho. Our commitment is to provide expert, professional, and timely work to our customers, with the highest level of professional workmanship. Our team includes fully licensed and insured master, journeymen and apprentice plumbers with years of experience and knowledge.