Pressure Tanks & Water Systems in Moultonborough
Geology: Granite bedrock, variable till, lakeside ledge · Typical depths: Commonly 200–500 ft · Carroll County
The damage a failed tank does is not spread evenly on a seasonal property — it is concentrated. A tank loses its air charge slowly whether the house is occupied or not, but a pump only wears when water is actually being drawn. So the charge quietly goes over the winter, nobody is there, and then the entire year's punishment arrives in the ten or twelve weeks the house is at its busiest. A full Moultonborough house in July can put a pump through more starts on a dead tank than a year-round house in Center Harbor manages in a whole year on the same fault.
The second pattern here is a mismatch nobody planned. Shorefront camps around this town have been steadily enlarged and rebuilt — bedrooms added, bathrooms added, a dishwasher and laundry where there used to be a sink and a hose — and very often the water system was simply left alone because it was working. A tank correctly sized for one bathroom is not broken when it serves four. It is outnumbered. It empties before the draw is finished, so the pump starts on almost every tap, and it looks exactly like a failed tank to anyone listening at the sink.
And the complaint we hear most in July is low pressure, which in this town is usually not the well at all. Wellheads on developed shoreline lots get sited wherever setbacks and the septic leave room, which can mean a long run and a climb up the bank to a house set above the water. Add an irrigation zone, a boathouse hose bib and an outdoor shower all running on the same August afternoon, and the pressure at the upstairs fixture is a plumbing and scheduling question rather than a pump question.
Moultonborough Note
If you do one thing to a seasonal Moultonborough water system this year, have the tank's air charge read on the day the house is opened or closed. The system is already depressurised then, and that is the only condition in which the reading is worth having.
Sized for the Camp, Not for the House
A seasonal property gives you one genuine advantage over a year-round house, and almost nobody uses it. Twice a year — the day the system is drained for winter and the day it is refilled — the system is already depressurised. That is the only condition in which a tank's air charge can be read and set honestly. A year-round household has to create that moment deliberately; you get it handed to you every spring and every autumn.
On sizing, the question to settle before buying anything is whether the tank holds its charge. If it does and the pump still starts on nearly every draw, the tank is not failing — it is too small for the house that was built around it. Moving up a size is the cheapest worthwhile change you can make to one of these systems, and it is the change most often skipped because the old tank is not technically faulty.
On pressure, we work through the plumbing before touching components. A clogged sediment filter, a valve nobody has fully opened since the rebuild, a switch still set for the old system, mineral buildup in whatever pipe survived the renovation — these are cheap, and they are more likely here than a failed anything. If the pressure is only poor when two things run at once, the well is keeping up fine and there is nothing to replace: move the irrigation timer to five in the morning and the complaint usually disappears on its own. That is not a job for us, and we would rather tell you so than sell you a tank.
A pressure tank is $400–$1,200 installed and a pressure switch $150–$400. Going up a tank size on a rebuilt lake house lands at the upper end of that range and is still a fraction of the $700–$1,600 submersible replacement it is there to prevent.
- Air charge read and set with the system depressurised
- Tank sized for the house as it stands now, not as it was built
- Closing and opening used as the two natural service windows
- Pressure traced through the plumbing before parts are sold
- Simultaneous demand ruled out before anything is replaced
- An honest answer when the fix costs nothing at all
Other Well Work in Moultonborough
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Tanks & Pressure Near Moultonborough
Well & Pump Questions in Moultonborough
Our camp was enlarged but the water system was not. Does that matter?
It is one of the commonest things we find on this shoreline. A tank sized for one bathroom is not faulty when it serves four — it is outnumbered, and it runs out mid-draw so the pump starts on almost every tap. The test is whether the tank holds its air charge: if it does and the pump still starts constantly, the answer is a larger tank rather than a repair.
The house is closed all winter. When should the tank be looked at?
At closing or at opening, because the system is already depressurised on both of those days and that is the only state in which an air-charge reading means anything. It is also the only time of year somebody is standing next to the tank anyway. Asking for it then costs almost nothing extra.
Pressure drops when the sprinklers are running. Do we need a bigger pump?
Almost certainly not, and a bigger pump on a well that is keeping up will draw the well down faster and create a problem you do not currently have. If the pressure is only poor while two things run together, nothing is wrong. Shift the irrigation to early morning and see whether the complaint goes away — and if it does, there is nothing here for anyone to sell you.
Need Pressure Tanks & Water Systems in Moultonborough?
No-water calls get priority. Everything else gets a written estimate with an honest range rather than a tidy number that changes at 300 feet.