William C. Diamond Plumbing and Heating

William C. Diamond Plumbing and Heating We are a full service plumbing, heating and drain cleaning company. We service Morris, Sussex & Essex counties.

We are a full service plumbing, heating, air conditioning and drain cleaning company.

Great review from MrWilmersito
08/27/2026

Great review from MrWilmersito

Check out our great customer reviews!

Great review from Dan... "Very friendly and on point."
08/26/2026

Great review from Dan... "Very friendly and on point."

"Very friendly and on point."

Great review from Emily... "Kevin was great! Helped fixed multiple issues in a very short time period including getting ...
08/26/2026

Great review from Emily... "Kevin was great! Helped fixed multiple issues in a very short time period including getting our gas line up to code. Will absolutely use again"

"Kevin was great! Helped fixed multiple issues in a very short time period including getting our gas line up to code. Will absolutely use again"

Great review from Emily... "Bill Diamond was very professional. He took the time to answer all of my questions about my ...
08/23/2026

Great review from Emily... "Bill Diamond was very professional. He took the time to answer all of my questions about my heating and cooling system and made sure I understood everything. I highly recommend his company and services."

"Bill Diamond was very professional. He took the time to answer all of my questions about my heating and cooling system and made sure I understood everything. I highly recommend his company and services."

Great review from Stephanie... "I had a fantastic experience today when Bill came to my house to look at my first floor ...
08/22/2026

Great review from Stephanie... "I had a fantastic experience today when Bill came to my house to look at my first floor a/c. He diagnosed the problem right away and replaced my condensate pump on the spot. Thank you Bill for your honesty about the situation. I could not recommend William C Diamond plumbing more! If I could give them 10 stars I would!"

"I had a fantastic experience today when Bill came to my house to look at my first floor a/c. He diagnosed the problem right away and replaced my condensate pump on the spot. Thank you Bill for your honesty about the situation. I could not recommend William C Diamond plumbing more! If I could give t...

Great review from Marlene... "Rob did a great job; explained what he needed to do and was extremely efficient and patien...
08/22/2026

Great review from Marlene... "Rob did a great job; explained what he needed to do and was extremely efficient and patient in helping me set up the online portal"

"Rob did a great job; explained what he needed to do and was extremely efficient and patient in helping me set up the online portal"

Great review from Ken... "Completed a propane to natural gas conversion including running piping from meter install to h...
08/19/2026

Great review from Ken... "Completed a propane to natural gas conversion including running piping from meter install to house. Excellent work. Staff are great. They are courteous and respectful of your property. They are the only plumbers we will use!"

"Completed a propane to natural gas conversion including running piping from meter install to house. Excellent work. Staff are great. They are courteous and respectful of your property. They are the only plumbers we will use!"

Great review from Florence... "Bill just did an oil to gas conversion at our home. He did a fantastic job! I can't belie...
08/03/2026

Great review from Florence... "Bill just did an oil to gas conversion at our home. He did a fantastic job! I can't believe he was able to get that huge oil tank out of the basement without any problem. I really appreciate his knowledge and professionalism."

"Bill just did an oil to gas conversion at our home. He did a fantastic job! I can't believe he was able to get that huge oil tank out of the basement without any problem. I really appreciate his knowledge and professionalism."

Great review from Bob... "Very fast response by noon the day I called and had a new tankless water heater installed comp...
07/28/2026

Great review from Bob... "Very fast response by noon the day I called and had a new tankless water heater installed complete by dinner time!"

"Very fast response by noon the day I called and had a new tankless water heater installed complete by dinner time!"

Great review from Jessica... "Had a plumbing issue in the shower in our master bathroom and Rob from William C. Diamond ...
07/24/2026

Great review from Jessica... "Had a plumbing issue in the shower in our master bathroom and Rob from William C. Diamond Plumbing and Heating did a great job with the repair - great communication, timely, explained the required repair, and did great work and cleaned up."

"Had a plumbing issue in the shower in our master bathroom and Rob from William C. Diamond Plumbing and Heating did a great job with the repair - great communication, timely, explained the required repair, and did great work and cleaned up."

Address

34 Deforest Avenue
East Hanover, NJ
07936

Opening Hours

Monday 7am - 6pm
Tuesday 7am - 6pm
Wednesday 7am - 6pm
Thursday 7am - 6pm
Friday 7am - 6pm

Website

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