About Us

Our History


High Purity Water was first established in South Grafton, Massachusetts in 1971 by Donald Sullivan, a former US Navy man who, after leaving the service, decided that “water really was in his blood.”

Almost forty years later, Donald’s son-in-law Bob Cadrin and his partner Rob O’Brien have built High Purity Water into the premier water treatment enterprise it is today.

Literally growing up in the business, Rob started at 13 in the very company he now co-owns with Bob, first delivering salt and eventually working his way up to a Water Specialist. Bob, who has been part of the operations since the mid 80’s, is an accomplished machinist and furniture maker with exceptional mechanical skills, all critical in designing and installing water treatment systems.

Treat your Customers the way you would want to be treated and the rest will fall into place… – Rob O’Brien, President

More than a marketing slogan, this has been High Purity Water’s driving philosophy since Rob and Bob took over the reins from Donald more than a quarter of a century ago. Under their guidance, the company’s experience, knowledge, and products are now unrivaled, as the operation continually strives to maintain a position of leadership in New England.

Problem Water Specialists for your home and business.

High Purity Water’s highly skilled, factory trained, water service specialist are the best in New England. Our service is unmatched in its professionalism and efficiency. Our field water service specialists have both the knowledge and experience to accurately diagnose virtually any problem and repair it quickly.

When you call High Purity Water, you will speak with a trained customer service representative who will assist you in setting up your service call, installation and deliveries. For specialized technical support, they will direct your call to the appropriate personnel to answer all of your questions and assist you in a professional, courteous manner.

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    Customer satisfaction is more than a slogan at High Purity Water. It is a fundamental part of our belief system in everything we do.
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    When you need it. We've got it! High Purity Water maintains a well-stocked warehouse to provide you parts and components fast.
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    LIVE customer service when you need it. No phone trees, no answering machines. High Purity Water is committed to providing not just the best quality water to your home and business, but the best service in the market.
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    Do you know what's coming out your tap? We do! You and your family deserve better water. Keeping on top of the newest water treatment technologies, High Purity Water has the right solution for your family or commercial enterprise.
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    Bob Cadrin, an accomplished machinist with exceptional mechanic skills, bring his years of mechanical engineering experience to the design and installation of High Purity Water's treatment systems.
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    Service FIRST, sales second. High Purity Water has a four-decade track record of resolving most of the residential and commercial water issues in New England.

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