State Line Plumbing and Heating is growing its water heater, boiler, and drain service across southern New Hampshire and the Merrimack Valley.

Plaistow, NH (PRUnderground) August 13th, 2026

Plaistow sits ten minutes from the Massachusetts border, and for most homeowners there, finding a plumber licensed on both sides of that line has always been the hard part. State Line Plumbing and Heating is licensed in New Hampshire and Massachusetts, and the company is now expanding the residential and commercial service side of its business across both states.

State Line handles water heater replacement, boiler installation and service, drain and sewer work, and emergency repairs. The crew is a small team of licensed plumbers who take the call, do the work, and stand behind it. Homeowners talk to the same people who show up in the driveway, from Plaistow and Atkinson through Salem, Derry, Exeter, and across the border into Haverhill and Methuen.

Owner Anthony Paolini has been a plumber his whole life, and he still answers the phone himself most days. People call when the heat is out or there is water on the basement floor, and what they want is a straight answer about what it costs and when someone can be there. That is the answer they get.

State Line is licensed and permitted for work in both states, so a job in Haverhill runs on the same schedule as a job in Plaistow. The company is building toward becoming the locally owned name people in the Seacoast and Merrimack Valley call first, for heating in the winter and everything else the rest of the year.

To book a service call or get a quote, call State Line Plumbing and Heating at 978-208-9914 or visit statelineph.com. Follow the company on Facebook at State Line Plumbing and Heating for seasonal maintenance tips and service updates.