Family Owned and Operated Plumbing & HVAC Company
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Testimonials

What Our Customers are Saying
  • I highly recommend this company.
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    “I found Diamond Plumbing on Angie’s List with a five-star rating. I was having problems with a sump pump and called for service. Moe came at the appointed time and I cannot tell you how happy I am with the results. I highly recommend this company.”

    Kathleen G.

  • As always great service. Highly recommend them.
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    “As always great service. Highly recommend them.”

    Kelly B.

  • William C. Diamond Plumbing and Heating is the best! I would definitely call them first. Thank You for your expertise!
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    “William C. Diamond Plumbing and Heating is the best. I have had a great experience with this Company. The technician , Moe, was on time, very polite and proficient. I called on Monday morning and Moe was at my house by 12:30. He did an excellent job in fixing my phantom flushing problem and installed new fixtures in 3 bathrooms And a new cut off valve. All the staff that I have dealt with are wonderful. I don’t want to see them for a long time, but I would definitely call them first. Thank You for your expertise. ☘️ Kathy Maguire. Definitely ✳️✳️✳️✳️✳️”

    Kathy Maguire

  • Bill and his team are reliable, professional and provide expert service!
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    “We have been using William C Diamond for Plumbing and Heating for over ten years. Bill and his team are reliable, professional and provide expert service!”

    P. Dohne

  • Did an excellent job, was very neat and carefully explained the problem and how he corrected it.
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    “I had a leak around the base of one of my toilets. I called a local in-town plumber and waited 2 days for a reply. I went on Angie’s List and received William C Diamond as an A-rated plumber. Got a call from them bright and early the next morning. A technician arrived at my house about 1 hour later. Derek was very professional and diagnosed the problem quickly and accurately. Did an excellent job, was very neat and carefully explained the problem and how he corrected it. While at my house, I asked him to review and give an estimate for replacing the shower mixing valve. He developed a plan for how best to do this job with minimum disruption of the shower tiles. I plan to have Him do this job within the next few weeks. I am very happy with the services performed and I would recommend William C Diamond to others.”

    Ron Lemp

  • Very professional and competent company.
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    “Very professional and competent company. They do what they said they would do when they say they will do it.”

    Richard M.

  • Very professional, courteous, and trustworthy
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    “Very professional, courteous, and trustworthy. Will call again if/when necessary, and would recommend to friends and family.”

    Frank Perry

  • Outstanding service.
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    “Outstanding service. The technician Derek was very professional, knowledgeable, and courteous. He arrived exactly on time, gave an estimate, and completed the work as estimated. The price was reasonable and the overall experience was great. Excellent customer service who gave me a follow-up call. Will definitely recommend this company to others.”

    Al

  • I sleep better knowing they are only a phone call away. Day or night.
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    “Every person I have contact with at Diamond has been knowledgeable, efficient and courteous. As a Diamond member,, I sleep better knowing they are only a phone call away. Day or night.”

    Alyce Hackett

  • Excellent Job
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    “Greg did the work and he did an excellent job. He was professional and courteous. The cost was reasonable as well. I would use Diamond Plumbing & Heating again.”

    Tamara

  • Above & Beyond Expectations
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    “These guys are awesome! On time, extremely professional workers, and very polite. Great work- second to none. Would highly recommend them.”

    Greg

  • Perfect Job
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    “We had a minor leak and called on a Friday afternoon. They were at our house within an hour, fixed the problem in about 30 minutes. They were friendly and polite and did a perfect job - fixed the leak and left the bathroom as clean as it was when they arrived.”

    Jean

  • Friendly, Professional, Clean- and FAST
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    “Greg, from William C Diamond, came over to fix a leaking pipe. He could not have been more friendly, professional, clean - and fast. I would definitely recommend the company!”

    Tom

  • Number 1 in the State!
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    “Number 1 in the State!!!!! Very Professional & 100% Neat. Awesome work!!”

    Brenda

  • Nice, knowledgeable and answered all our questions!
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    “Our HVAC guy (Chris) was great. Was nice, knowledgeable and answered all our questions. Was impressed with the job.”

    Tim

  • William answered my call immediately.
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    “William answered my call immediately. We discussed my needs and determined that he is a little too far from my home to efficiently replace my boiler so he suggested I look for someone local. I truly appreciate his honesty and should I have a project that wasn't an emergency, no heat or hot water, I would call him for an estimate. Definitely an honest and honorable owner.”

    Jim Black

  • They return phone calls promptly. I would highly recommend their services.
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    “We have been customers of William C. Diamond for about a year. First job, they replaced our boiler. It looks like a work of art, in a good way. Neat, clean, no mess. Done in a timely manner. Chris came for the annual service. Second job, they completely replaced all the plumbing in our bathroom. We were able to share our concerns with them, and received an intelligent solution. Third job, today. We had a leak in a shut-off valve underneath the sink. I called and left a message on Sunday afternoon. I received a return phone call this morning around 8:30am, and Derrick arrived about 9:30. By 10 am, the job was completed. Neat, professional, no water mess in disconnecting the bad valve, no leaks thereafter. No mess left for me to clean up. I find their prices are fair for the services they provide. They always provide an estimate before beginning. They return phone calls promptly. I would highly recommend their services.”

    Barbara Peroni-Kay

  • Starting from my first frantic call to Bill, to the happy sound of my toilet flushing, Diamond Service all the way!
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    “Starting from my first frantic call to Bill, to the happy sound of my toilet flushing, Diamond Service all the way! We woke up to a broken water main outside of our house. Bill was out to look at it within an hour! Bill eased my mind when I had water pouring through my foundation. Thanks to his masterful knowledge of plumbing, we were able to get his estimate and the job going right away! Bill and Scott got our water main fixed so quickly! Very professional service. Great communication with us every step of the way. You never appreciate a flushing toilet....until you can't flush! lol All fixed now! Thanks!”

    jim ALBRECHT

  • They are so honest, reliable, and sincere I highly recommend them and I'm so thankful I chose their services!
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    “Being a first time homeowner, closing right before Christmas I never anticipated any plumbing issues, but I had major issues and couldn't find a plumber to come in a timely fashion and not rip me off. This is a great company from service to price and more! Instead of ripping me off coming out on Christmas Eve they gave me a Christmas coupon. They are so honest, reliable, and sincere I highly recommend them and I'm so thankful I chose their services ! Derek is my favorite tech he’s a prefect fit for this job I’d love to have him on every service call !!”

    Melissa Moore

  • We've been using William C. Diamond Plumbing for years. He's always been fair and honest!
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    “We've been using William C. Diamond Plumbing for years. He's always been fair and honest. From big jobs ( our kitchen renovation, hot water heater, boiler maintenance) to pesky jobs (faucet replacements, leaky valves and pipes) he's been our go to guy. We highly recommend them. And, they're really nice guys, too.”

    Mary Georgaros

  • I am so happy that I called William C Diamond Plumbing.
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    “When you have a flood in your home, panic is all you know. I am so happy that I called William C Diamond Plumbing. He was totally helpful on the phone and had a crew at my house in 20 minutes. They were professional, took time to explain what was going on and fixed our problem. Can't ask for more than that! Thank you”

    Andrea Eckert

  • I HIGHLY RECOMMEND William C. Diamond plumbing.
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    “I HIGHLY RECOMMEND William C. Diamond plumbing. They are top notch when it comes to professionalism, personality and skill. I can always get an appointment any time I need them and they always fix the problem right the first time. I won't call anyone else for my plumbing needs. They are the BEST!!!”

    Donna Schneider

  • Two thumbs up!
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    “I highly recommend William C Diamond Plumbing to everyone. Very professional and friendly team. I had an emergency and Bill and his team came out right away to take care of my problem. I wouldn’t hesitate to pick up my phone and call for any future issues. Two thumbs up!”

    Fawn Coward

  • I cannot say enough about the guys at William C Diamond Plumbing & Heating!
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    “I cannot say enough about the guys at William C Diamond Plumbing & Heating. They are very professional and always on time. Whenever I have an issue, they are there the same day. They are top notch and our go-to plumbers!”

    Marisa Jones

  • Easy to do business with, nice people from owners to staff, do what they say they are going to do when they say they are going to do it
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    “Easy to do business with, nice people from owners to staff, do what they say they are going to do when they say they are going to do it, fair pricing, never have to come back because the job is always done right the first time.”

    John Tarantino

  • I always have a good experience with William C. Diamond Plumbing and Heating
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    “I always have a good experience with William C. Diamond Plumbing and Heating. Moe was our technician today and he did a great job with our bathroom work order. I will continue to use them for a long time.”

    Ben Weintraub

  • Work completed expeditiously and expertly
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    “Arrived at time expected. Work completed expeditiously and expertly. Happy to recommend this company.”

    William McGuire

  • Derak did a great job fixing the plumbing issues we had at our home!
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    “Derak did a great job fixing the plumbing issues we had at our home. He was friendly, professional and very knowledgable and even solved a problem no one had been able to solve in the past. We highly recommend him and will request him going forward for any other issues that arise. Overall we have been very pleased with the service at William C. Diamond Plumbing and Heating!”

    Colby Bernstein

  • Our heat stopped working 3 days before my due date!
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    “Our heat stopped working 3 days before my due date. Company was quick to respond. Chris replaced our hot surface igniter and our heat is working well. Thank you to Chris for helping us on such short notice!”

    Martha Cotton

  • Rapid response and reasonable rates, I highly recommend them.
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    “After having a pipe freeze over the weekend and become a leak once the weather warmed, I almost went swimming. Called Bill after ten in the morning and his guys were here before lunch. Professional, prompt and creative. Not only did they replace the ruptured pipes, they re-routed them so it wouldn't happen again! Rapid response and reasonable rates, I highly recommend them.”

    John O'Connor

  • Bill Diamond is everything a competent contractor should be!
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    “Bill Diamond is everything a competent contractor should be. He is professional, on time and does what he says he will when he says he will. I have used William C. Diamond plumbing on several occasions and have never been disappointed. I will recommend William C. Diamond Plumbing to everyone I know.”

    Darryl Edwards

  • Not only did Bill fix everything for a reasonable price, he was on time and neat.
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    “I was getting my basement waterproofed and the waterproofing company brought in Bill Diamond to move my oil line. While there, I asked him to look at a number of other problems I had with my plumbing including slow draining lines, replacing a laundry sink, a cracked sewer pipe and even some heating problems throughout the house. Not only did Bill fix everything for a reasonable price, he was on time and neat.”

    Previous Customer

  • Diamond Plumbing is Awesome!
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    “Greg and Gladys were over today to do some work. Very nice and professional. Diamond Plumbing is awesome!”

    Gary

  • Quality Work, Courteous Service
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    “Very prompt, arrived at the stated time. Quickly fixed the problem ( leaking sink) and patched up another issue in the shower. Would definitely recommend.”

    Monica

  • Prompt, Courteous and Excellent Service
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    “Service man came right away, diagnosed the problem, kept the work area clean and turned off the water that was leaking from my dishwasher.”

    Dave

  • Can't say enough good things.
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    “Diamond sent Chris to evaluate the scope of the work I needed. Moe was sent to do the plumbing repairs and updates. Both were very professional and knowledgable. Moe spent 7 hours making sure every job was completed no matter large or small. Both men spent time explaining everything in detail. Moe did not do take a step until he eplained what needed to be done and why.”

    Alyce Hackett

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