The Home of Quality Craftsmanship

Koval Plumbing, Heating & Air Conditioning Inc.

Phone Icon (978) 856-8436 
Fully Licensed & Insured

NH-GFE - 0803006 

Contact Us Today

Koval does it all!

Quality Work, Dependable Service, 24-Hour Emergency Repairs

Reliable Plumber in Merrimack Valley

Ensure your continued comfort in your home or commercial space. At Koval Plumbing Heating and Air Conditioning Inc., our success rate with plumbing and HVAC services are second to none. Whether you need emergency HVAC services or routine maintenance, our plumber guarantees the highest quality work at the best market price. We believe that a quality job begins with quality people, so we employ only highly trained full-time tradespeople. Plus, our experts recognize the importance of proper planning and staging on projects and are always thinking three steps ahead. This saves you money, produces a better end product, and makes for a smooth running job site. Contact us today in the Merrimack Valley and Southern New Hampshire area when you need expert plumbing and HVAC repairs.

Commercial Plumbing in Merrimack Valley


Residential Plumbing & HVAC Services



$50 Off
Water Heater Replacement

$200 Off
Furnace or Boiler Replacement

$150 Off
Rinnai Tankless Water Heater


About Us

Serving the Merrimack Valley and Southern New Hampshire area for more than 30 years, Koval Plumbing Heating and Air Conditioning Inc. is the contractor homeowners choose first. Our professional estimating, project managing and production experience is your guarantee that the project is completed on time with uncompromising quality.  Call or text us today to discuss your HVAC or plumbing needs.

(978) 856-8436
(978) 866-5321 (Text)

Hours of Operation
Monday - Friday, 8:00 a.m. - 5:00 p.m.
Saturdays by Appointment. 24/7 Emergency Service.

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Service Area
The Merrimack Valley & Southern New Hampshire

We Accept Discover, MasterCard, and Visa