Cranberry Township: 724-776-4930 

South Butler: 724-586-7522

West Sunbury: 724-637-2040 

Butler: 724-284-1312

Dr. Waterheater is celebrating over 30 years of serving Western Pennsylvania. Family owned and operated, Dr. Waterheater specializes in repair and replacement of residential, commercial, and industrial water heaters. This specialization gives us competence and expertise. This assures you the best water heater solution to meet your needs and budget.

Who We Are

Dr. Waterheater is family owned and operated from the beginning. President, John Relihan is the second generation managing the company, with the third generation is on its way up. In its over 30 years of business, Dr. Waterheater serves over 700 customers a year. 

We stock the quality, professional grade models of water heaters and supplies in our trucks so that we can repair or replace in one visit. In many cases, this is within the same day you call!

All of our technicians are factory authorized and trained in every model we supply. All work is preformed by clean, professional, uniformed plumbers. When we are done, you will have no mess to clean up, including we take the old water heater with us!

Dr. Waterheater is proud to have never had a single complaint in over 23 years as a member of the Better Business Bureau.

Dr. Waterheater accepts cash, check, and all major credit cards (Visa, Mastercard, Discover, American Express). We also provide a senior discount! Dr. Waterheater’s price includes everything. There is never an extra charge for disposal of the old water heater, basement steps, or mileage.


Dr. Waterheater is proud never to have had a single complaint. Dr. Waterheater only sells quality and professionally built, high grade equipment, not something found at a discount home store who are focused on price points. We also repair water heaters. This specialization provides our customers with a level of competence and expertise that is unrivaled. Our service men include registered master plumbers, and our owner is respected in the plumbing profession as an ally and authority on water heaters.

This authority didn’t just happen. On every water heater model he sells, John has trained at the factory and continues to take training via the internet to remain a most competent expert. In fact, John is respected by the manufacturers too! John has served on the board of advisors for water heater manufactures and steered product design efforts on current product lines.

Dr. Waterheater does not serve its customers with the “what size ya want – we have three models, pick one, I’ll help you out to the car with it and the bendy pipe all-purpose adaptor kit – good luck, y’all” attitude of big box stores.

 Dr. Waterheater starts by understanding the needs of the household:

size of home

number and ages of occupants

number of bathrooms

peak demand times for hot water

All of these factors help Dr. Waterheater determine exactly the right water heater solution for the needs and budget.

Products and the CEC Program

Dr. Waterheater is the authorized provider for the Central Electric Cooperative  (CEC) Waterheater Program!

Are you a residential member? If so, you can purchase a Marathon, high-efficiency CEC water heater from Dr. Waterheater, Inc. The tank must be installed by Dr. Waterheater and you must participate in the cooperative’s load management program for a minimum of five years.

For more information and up to date program details, please go to:

(once on the page, select Products & Services, then Water Heater Program)

*due to the possible changes to the CEC website, actual location may vary.

Sudden Service

Sudden service available, residential and commercial water heater specialist.