Water heater repair in Nashua, NH

A pond chain on Pennichuck Brook

Pennichuck Water Works has served Nashua since the 1850s, and after a long fight the city bought the company outright in 2012, so the water utility is now city owned even though it keeps its old name. Its primary supply is Pennichuck Brook, which leaves Pennichuck Pond in Hollis and runs east through Holts, Bowers, Harris and Supply ponds in north Nashua and Merrimack before it reaches the Merrimack River. Pennichuck treats that water at its plant on the brook, and in summer or a dry autumn it pumps extra water from a river intake on the west bank in the Town of Merrimack.

Neither the brook nor the river picks up much calcium on its way through New Hampshire granite and glacial sand, so tanks in Nashua seldom fill with crusty scale. That gentleness has a cost: soft water chews through a tank's sacrificial anode faster, leaving bare steel to corrode from within. The other local factor is temperature, since pond water near the treatment plant drops into the mid 30s during a long cold stretch.

French Hill tenements to South Nashua subdivisions

The city grew around the Nashua Manufacturing Company and the Jackson mills, and the housing built for their workers still fills French Hill, the Tree Streets and Crown Hill. These are wooden tenements, two-families and triple-deckers on tight lots, many with fieldstone foundations, low cellar ceilings and a cluster of small heaters, one per apartment, set on a damp slab beside the boilers.

The North End, around Concord Street and the streets off Manchester Street, has larger Victorians and early colonials with roomy basements, often heated by oil or gas boilers that also feed an indirect hot water tank. South Nashua, the neighborhoods off Spit Brook Road and the developments near the Daniel Webster Highway malls filled in from the 1960s on with capes, raised ranches and condo complexes, where a 40-gallon tank usually stands in a garage corner, a basement or a closet beside the laundry.

Ice storms, long cold and the Nashua River

Winter in the Gate City runs from late November well into March, with subzero nights most years. The December 2008 ice storm left much of southern New Hampshire dark for days, and a repeat is the reason many Nashua plumbers talk about power before they talk about efficiency. Fan-driven heaters, including direct-vent, power-vent and nearly every tankless gas unit, go cold the moment the Eversource lines come down, while a plain chimney-vented tank burning a standing pilot carries on heating.

Snowmelt and spring rain raise both the Nashua River and Salmon Brook, and older basements in the lower parts of downtown and near Mine Falls can take on groundwater in wet years. A heater sitting directly on a cellar slab that floods every few springs will rust out at the base long before its time, so a raised stand is cheap protection.

What Nashua plumbers get called for

• February shortfalls, when the last shower in a busy house runs cold because the tank cannot keep pace with mid-30s supply water.
• Rusting tanks whose anode rod was consumed by soft Pennichuck water years ago.
• Fan-assisted heaters going dark during ice storms and wind-driven outages.
• Pilots blowing out in drafty French Hill and Tree Streets cellars.
• Leaking indirect tanks and tired boiler coils in North End Victorians.
• Closet tank failures in South Nashua condos that send water into the unit below.

When a tenement tank loses its flame on a subzero night, getting a stubborn pilot and gas valve working again walks through the visit, and for a Spit Brook Road household where the hot water fades halfway through the morning, tracking down why the hot water quit covers the checks.

Nashua price guide

Nashua sits just over the line from Massachusetts, and its rates trail the Route 128 suburbs while running ahead of most of the country. Low-ceiling tenement cellars, three or four heaters in one building, and tankless units big enough for winter pond water are the usual reasons a quote climbs.

State licenses and the city's Building Safety office

Plumbers and fuel gas fitters in New Hampshire are both licensed by the state's Mechanical Licensing Board, which the OPLC oversees from Concord. A gas tank replacement needs someone holding the plumbing license and someone holding the gas fitting license, which is often the same person, and every license can be confirmed through the OPLC's online lookup before anyone touches your gas line.

Permits inside the city come from the Department of Building Safety at City Hall, 229 Main Street. Nashua enforces the state building code with its own local amendments, and an inspector visits after a replacement to review the gas piping and shutoff, the vent, the relief valve drain and, on electric tanks, the wiring and breaker. Hudson, Merrimack and the other neighboring towns run their own permit desks.

Sizing a heater for pond water at 35 degrees

A shower at 105 degrees in January asks a Nashua heater for a rise of roughly 70 degrees, and a tank set to 120 must lift its water about 85 degrees. Tankless units rated on warmer test water lose a lot of flow in those conditions. Local plumbers typically pick a high-input model for whole-house use and check whether the Liberty Utilities meter and piping can feed it, since an upgrade to the gas service is common.

Tank households with two or more full bathrooms usually land on a 50-gallon gas model or an indirect tank fed by a modern boiler. Heat pump water heaters suit dry, finished basements in South Nashua that stay comfortable all winter, but a fieldstone cellar on French Hill that drifts into the 40s gives them too little heat to pull from.

Repair or replace in Nashua

Gas tanks in Nashua commonly give 8 to 12 years, with the longer end going to owners who swap the anode before the soft water finishes it. If the heater is younger than eight, a new thermocouple, valve, element or relief valve is normally the cheaper path. Once it passes ten and shows rust on the jacket, water at the base or one breakdown after another, start pricing out the next tank rather than ordering one more part for it. Eversource and Liberty Utilities have run incentives for high-efficiency and heat pump models at times, so mention them when you get a quote.

Around Nashua

Hudson, across the Merrimack, has a town-owned water system and its own code enforcement staff. Merrimack gets most of its water from wells run by the Merrimack Village District. Hollis and Amherst to the west are largely on private wells, where iron, hardness or radon can show up in testing. Litchfield mixes Pennichuck service with wells. Tyngsborough and Dunstable sit just south in Massachusetts, where a different state board licenses the trades.

Water heater questions from Nashua