(908) 517-3152
Why rely on separate contractors when O'Brien Plumbing, Heating & Air Conditioning can answer all your residential and commercial heating, cooling, and plumbing concerns? With more than 23 years of experience as an HVAC contractor and master plumber, we’re your one-stop source in Hardwick and Sussex County. Call today for heat pump and boiler problems, air conditioning repair and installation, water treatment services, and more!


Emergency? No Water, No Heat, No Air Conditioning, Leaks, No Hot Water, ECT. - NO WORRIES As Memorial Day quickly approaching, Here at O'Brien Plumbing, we never take a day off!  #Hvac #HVACREPAIRS #HVACINSTALLATION #PLUMBING #OPEN24/7 #PLUMBERS #HVACCONTRACTOR #WARRENCOUNTY #SUSSEXCOUNTY #MORRISCOUNTY #HUNTERDONCOUNTY #HOTWATERHEATERS #DRAINCLEANING #AIRCONDITIONER #WELLTANKS #WELLPUMPS #WATERTREATMENT #SOLARSALT Don't forget to visit our new website!    

A few of our Service Locations

Did you know we service Warren, Morris, Hunterdon Counties however not limited too in addition to Sussex County? If it's a leak, drain cleaning, water treatment, heating, air conditioning or a plumbing situation we are will be there. Do you live or near the following towns?... Blairstown Newton Sussex Belvidere Washington Hackettstown Mount Olive Roxbury Allamuchy Oxford Washington Long Valley Sparta Then we are just down the street and always a phone call away! 973-383-4101, 908-362-8130, 908-517-3152    

We're Hiring- HVAC TECH!

Plumbing, Heating and Cooling company currently hiring for a plumber/hvac helper.We have openings for goal oriented individuals to work in a growing plumbing, heating, cooling, repair and replacement Company.We offer top wages, medical insurance, uniforms, and a professional pleasant fun working environment.Requirements-No Experience required- will train the right candidate-Capable of working overtime when the situation arises-You must possess a burning desire to succeed and excel at your trade-Be honest and courteous. Perform beyond the clients wildest expectations-Be concerned, caring, and willing to work with others as a team member-Must have a clean driving record-Must have own vehicle

Air Conditioning Service and Repairs in Hackettstown NJ

O'Brien Plumbing, Heating & Air Conditioning is your Hackettstown NJ source for air conditioning repairs and maintenance. 

Announcing the Launch of Our New Blog!

This is our inaugural post. We are an HVAC, plumbing, and water treatment firm serving the greater Sussex County area.

Discounts Available for Veterans, Military, and Seniors!

Call us to find out about great discounts for veterans, active military personnel, and senior citizens.