Diamond Mechanical, Inc.

Call Directions Website Contact the business

Diamond Mechanical, Inc. We specialize in mechanical and plumbing construction projects. Since 1969, we have built a solid reputation in Delaware as knowledgeable and note-worthy.

Work place safety is something that should never be ignored. I know we all may have at some time skipped PPE.Why Worker...
10/23/2026

Work place safety is something that should never be ignored. I know we all may have at some time skipped PPE.

Why Workers Skip PPE
• Inconvenience: Walking back to a truck or storage area for gloves, safety glasses, or a hard hat feels like a waste of time.
• Overconfidence: Believing a quick cut, lift, or fix can be done without incident.
• Discomfort: Wearing hot, heavy, or stiff gear can feel cumbersome during fast-paced work.

The Reality of Jobsite Accidents
• Injuries happen in seconds when routine tasks go wrong.
• Regret is immediate: the phrase "I wish I had my gear on" is common the moment an avoidable injury occurs.
• Skipping PPE leads to severe eye damage, lacerations, head trauma, and long-term disability.

Best Practices for Workplace Safety
• Keep PPE close: Store frequently used items (like safety glasses and gloves) on your person or in an easily accessible pouch rather than leaving them locked away in a distant vehicle.
• Inspect your environment: Be aware of your surroundings. Are personnel lifts being utilized, are hazardous chemicals being used. Let other know if you think there is an unsafe condition.

Our guys just finished up a job featuring a little bit of everything. From specialty vacuum systems to large HVLS fans a...
10/16/2026

Our guys just finished up a job featuring a little bit of everything. From specialty vacuum systems to large HVLS fans and rooftop units.

Headed into winter with lots of projects and a full schedule!!!

❄️ Winter freezing temperatures sneak up fast! Don’t wait until you're left in the cold.Before the first freeze hits, ma...
10/09/2026

❄️ Winter freezing temperatures sneak up fast! Don’t wait until you're left in the cold.
Before the first freeze hits, make sure to:
• 🚰 Unhook your garden hoses and install insulated boots on outdoor spigots to prevent burst pipes.
• 💨 Change out filters and clean your coils to keep your system running efficiently.
• 🔥 Schedule your professional HVAC inspection so your heating system is ready for winter weather.
Don’t let a sudden freeze catch you off guard!!! Our local service team is ready to inspect, tune up, and keep your commercial business warm all winter long.
📞 Give Diamond Mechanical a call today at 302-697-7695 to book your appointment!

Projects are moving fast here at Diamond Mechanical! As soon as one closes, another starts, and our team loves staying b...
10/02/2026

Projects are moving fast here at Diamond Mechanical!
As soon as one closes, another starts, and our team loves staying busy and delivering top-tier work.

Check out this underground plumbing piping and the sleeves ready for the second floor.

Next up: pressure testing and backfilling!

The next time you use a plumbing fixture, remember the incredible craftsmanship hidden behind the walls and under the ground that most people never see.
A huge thank you to our crew for doing another great job! 🛠️💪

09/23/2026

WE’RE HIRING — MECHANICAL / PLUMBING PROJECT MANAGER
Diamond Mechanical is looking for an experienced Project Manager to join our growing team.
We’re looking for someone who understands the mechanical and plumbing industry, can manage projects from start to finish, and knows how to keep the job moving — on schedule, on budget, and done right.
What we’re looking for:
• Experience managing HVAC and/or plumbing projects
• Strong communication and organizational skills
• Ability to manage customers, vendors, subcontractors, and field crews
• Ability to read plans and understand project scope
• Strong problem-solving and decision-making skills
• Someone who takes ownership and holds themselves and their team accountable
• A team player who is willing to get in the trenches when needed
At Diamond Mechanical, we believe in doing quality work, taking care of our customers, and taking care of our employees.
If you have the experience, work ethic, and drive to be part of our team, we want to hear from you.
📩 Interested? Send us a message or contact Diamond Mechanical to apply.
Diamond Mechanical — Built to Work. Built to Last.

Diamond Mechanical just finished up another project with our colleagues at Diamond Electric.Updating an HVAC system and ...
09/17/2026

Diamond Mechanical just finished up another project with our colleagues at Diamond Electric.
Updating an HVAC system and outdated lighting. So nice to have everything in-house.

The Diamond Group is one of the few companies that have engineering, mechanical, plumbing, HVAC Service and electric in one building. We pride ourselves on working together for our local customers.
We are also getting ready to start another project with our Diamond State Engineering colleagues as well. Stay tuned for that one…………

It's never too early to get your HVAC equipment ready for cold weather. Winter is right around the corner.Furnace, boil...
09/04/2026

It's never too early to get your HVAC equipment ready for cold weather. Winter is right around the corner.
Furnace, boiler, heat pump inspections and filter replacements are key to getting through the next cold winter.
Our service team is ready!!! Don't wait til it's too late.
Call Diamond Mechanical's Service number 302-697-7695.

Diamond Mechanical closing out another challenging project. An old water feature in a public park in Wilmington, DE nee...
08/27/2026

Diamond Mechanical closing out another challenging project. An old water feature in a public park in Wilmington, DE needing restoration.
Limited space and not knowing how long this has been shut down and if there are any underground damaged pipes.
Our guys knocked it out of the park!!!

Diamond Mechanical was tasked with replacing an aging boiler system in a structure more than a century old. As you might...
08/21/2026

Diamond Mechanical was tasked with replacing an aging boiler system in a structure more than a century old. As you might expect, the project presented numerous challenges, including limited space for new equipment and ductwork. The existing infrastructure was tired, outdated, and simply worn out.

The Diamond Mechanical team worked diligently to develop a design-build solution that would fit within the building’s existing spaces while meeting the owner’s requirements and complying with local codes.

Once again, Yanmar proved to be the right fit for the project. Its flexible installation options, energy efficiency, and quiet operation made it an ideal solution for the busy residential environment surrounding the building. By combining thoughtful design with the right technology, Diamond Mechanical delivered a modern, efficient system while successfully navigating the unique challenges of a century-old building.

Another big underground project for Diamond Mechanical. Besides HVAC equipment, Yanmar also manufactures heavy equipmen...
07/24/2026

Another big underground project for Diamond Mechanical. Besides HVAC equipment, Yanmar also manufactures heavy equipment. Being an authorized dealer for Yanmar, of course we are using this awesome excavator.

Our field guys did a great job on this underground. Measuring, marking, excavating, installing pipe, pressure test, then finally backfill and tamp. Lots to do for just putting some pipe in the ground!!!!

Address

3588 Peachtree Run
Dover, DE
19901

Opening Hours

Monday 8am - 4pm
Tuesday 8am - 4pm
Wednesday 8am - 4pm
Thursday 8am - 4pm
Friday 8am - 4pm

Telephone

+13026977694

Website

Alerts

Be the first to know and let us send you an email when Diamond Mechanical, Inc. posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Contact The Business

Send a message to Diamond Mechanical, Inc.:

Shortcuts

Share

Category