Daniel R. O'Brien Plumbing and Heating

01/14/2026

07/04/2025

🔧💧 Stay cool, stay safe, and enjoy the red, white, and blue!
❤️🤍💙🇺🇸
From our family to yours — Happy Independence Day!

03/31/2024

“May the Miracle of Easter bring you renewed hope, faith, love and joy!”

02/27/2024

14 year old water heater finally went
Brand new Bradfordwhite propane water heater install
Out with the old in with the new
Easy swap out and very reasonable
Life span of water heaters range 10-12 years ‼️

02/24/2024

Heating - Air Conditioning- Dehumidifier- Fan ❗️❕❗️
Winter and Summer usage ‼️
Fujitsu split units for 3 separate rooms
Each room has its own thermostat to control the liking of the room. With one outside condenser which here we mounted on the wall to save room and space
❄️

🆓Estimates
☎️ Today
📍 Nassua 👉🏻 Suffolk
❌ no subcontractors
🫱🏻‍🫲🏼 Family Owned & Operated
📞 631-942-4498

02/17/2024

New Installation for Boiler and Water Heater‼️‼️
Peerless cast iron boiler w/ 5zones of heating
50 Gallon Bradford white indirect heater
All new materials never used from original

Get your self a beautiful efficient mechanical system
All set up for you and never worry again ❕❗️❕

🆓 Estimates
📍 Nassua 👉🏻Suffolk
❌ Subcontractors
🫶🏻 DOB Crew only ❗️
☎️ 631-942-4498

02/14/2024

Happy Birthday to my beautiful Valentine’s Day helper🫶🏻
My beautiful daughter who loves to come to work anytime she can 😍 🎂
Dobplumbing lil lady

02/11/2024

Oil tank Removal ‼️❕❗️
Pump out what’s left❕
Disconnect what’s there ❗️
And take away ❕
DOB- Plumbing Heating Air conditioning