We're Hiring!

Summer Hours:
- Monday - Friday: 10 A.M. – 5 P.M.
- Saturday: 9 A.M. – 4 P.M.
- Sunday: 9 A.M. – 12 P.M.
October Hours:
- Monday - Friday: 10 A.M. – 4 P.M.
- Saturday and Sunday: Closed
Winter Hours: (November - December)
- Tuesday – Thursday: 10 A.M. – 4 P.M.
- Friday – Monday: Closed
Holidays our store is closed:
- 4^th of July
- Labor Day
- Memorial Day
- Columbus Day
- Veteran’s Day
- Thanksgiving (11/22/22 – 11/27/22)
- Christmas and New Year’s Eve/Day (12/22/22 – 1/3/23)

Your One Stop Shop For All Swimming Pool Needs

Welcome! Underwater Pool Masters, Inc. is a full-service swimming pool company located in Central Massachusetts. Our expert staff is fully prepared to prevent, diagnose, or solve any problems with your residential or commercial swimming pool. We do NOT build or install pools or pool liners.

Contact us to learn more

Pool Opening & Closing

Why struggle with pool opening and closing? Just relax and let Underwater Pool Masters handle these annual tasks, besides our trained technicians we have everything you need from chemicals to parts and accessories to keep your pool running like new!

Leak Detection

In addition to regular pool maintenance programs, our company offers fast leak detection services to diagnose and repair the source of a leak. Whether you know the source of the water loss or not, our team has the equipment to repair the problem.

Cleaning & Maintenance

We can do the first major clean-up and vacuuming of the season to get your pool on the right track for the summer following your pool being opened for the season.

Repairs & Upgrades

Underwater Pool Masters can help you with all your repair and upgrade needs. Our fleet of trucks and highly skilled technicians can complete your upgrade requirements in a timely and professional manner.

Pool Inspections

Whether you require a pool inspection simply to verify that your pool is in good condition, for insurance purposes, or risk management, we will perform a thorough assessment of your swimming pool.

Dive Services

Our expert dive staff is fully prepared solve any problem with your residential or commercial swimming pool.

Water Testing

Lamotte Spin Lab Testing for the most accurate results . . . now available at Underwater Pool Masters

The people here are very nice, helpful, and extremely honest. They don’t try to sell you products you don’t need, and they are detailed in explaining steps to take when cleaning your pool. I am always greeted by staff with a smile. My pool started off as a swamp… Its 20×40 in size; in ground. It is now almost a clear blue, all because of the helpful advice and directions from the staff. They could have easily scared me into thinking I needed their maintenance service by saying it was a task best left for professionals, but instead, listened to my needs and respected my wishes of needing to stay within my budget. I would never go anywhere else!

Antoaneta Babilonia

Kudos many times over to Underwater Pool Masters. I purchased a home in Hopkinton in 2011. UPM had performed the pool inspection that summer as part of the home purchase.

Neal Robert Smookler

I can’t say enough good things about Steve and the staff at Underwater Pool Masters. I stumbled upon Underwater Pool Masters after calling numerous places near where I live (south of Worcester) over the course of many weeks, I guess my pool situation was not attractive enough for them. I am a new pool owner and knew nothing about pools so I was of zero help. I’m about 40-45 minutes away from Underwater Pool Masters and I wasn’t sure they would even consider it. They did, and they came out as fast as possible, fixed my leak, fixed my pump, educated me on everything I need to know, and got my pool running. Fast and efficient! Thank you Steve and the team at Underwater Pool Masters, you guys ROCK!

Jennifer StPeter

Today I visited the West Boylston store for the first time. The owner Steve and his staff were amazing! Extremely knowledgeable, they use the newest technology to test your water and generate a “to do list” which is easy to follow. Underwater Pool Masters has all the chemicals and supplies you need at reasonable costs. Steve is nationally accredited and offers training courses to other professionals and takes the time to teach his customers! Over-all the service was above and beyond what I expected! Do yourself a favor and visit the store with your water sample, you will not be disappointed! Thank you Steve and staff!

Amy Wieczorek