About Us

About Allison Plumbing

We are a family owned and operated company serving the entire Inland Empire and all of Southern California for repiping and commercial jobs with over 25 years of experience. Ken Allison, owner and operator, started this company to provide people with the most honest and high-quality work in the plumbing industry. Integrity and customer satisfaction are our top priorities. We specialize in plumbing repairs, copper repiping, new or repair work on water/gas piping, garbage disposals, tankless/regular water heaters, sewer/drain cleaning services and repair, and both bathroom and kitchen remodeling.

Why we are the leader in the plumbing industry

We don’t just specialize in one area of plumbing. Our experienced technicians have a comprehensive knowledge of both service and repair, as well as, commercial and new installation.

We ensure that every technician is capable of doing all facets of the job. Here at Allison Plumbing, we train all our techs to be competent with all aspects of plumbing to ensure success. Each technician has you covered from the ground up, start to finish!

Our Guarantee

At Allison Plumbing our #1 goal is client satisfaction.

 We’ll only suggest what you need.

Our technicians will never try to oversell you on something that is unnecessary. We’ll fix the problem with only what you need to ensure the lowest possible cost for you.

We’re experienced in all areas of plumbing.

Our technicians are highly trained for any problem. From leaky pipes to new installation to water heater repair and replacement, we have got your back.

We want to partner with you.

At Allison Plumbing, we want to develop a longterm relationship with our clients so that we can give the plumbing industry a better name and where home owners are not afraid to call the plumber.

Founded on Honesty, Integrity and Trust

“We’ve had Allison Plumbing out many times over the years and have never been disappointed. They get someone out right away, and are always friendly, efficient and most importantly to me, honest and fair. Once you try them, you will never have to wonder who to call again.”

— Kathy Johnson

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Complete Residential, Commercial, and Repiping Plumbing Services in Rancho Cucamonga, Upland, Claremont, Ontario, and surrounding areas.