the Hamptons
Well pumps, pressure tanks and water treatment in the Hamptons: for the houses not on the main
Replacing a well pump costs $975–2,821 nationally, about $1,898: a submersible $275–1,550, a constant-pressure system $2,000–5,000, a pressure tank $800–3,800, labor $45–150 an hour; a pump lasts 8–15 years. Many South Fork houses are on private wells that run iron and manganese, which stain fixtures once treated; we could not source a softener or filtration price and do not print one. Houses on the main pay the Suffolk County Water Authority $1.866 per hundred cubic feet plus $34.33 a quarter and a $20 water-quality charge; SCWA is replacing lead service lines by 2030 and treats PFAS with granular activated carbon.
Last updated · Reviewed by Wainscott Plumbing Co.
Well or main
The South Fork drinks from the aquifer under it, Long Island’s sole source of drinking water, either through a private well or through the Suffolk County Water Authority’s mains. Nobody publishes what share of East Hampton or Southampton houses is on which; SCWA is the dominant utility and the wells are everywhere the mains have not reached, which east of the village centers is a lot of streets. A house on a well has a pump, a pressure tank, sometimes a treatment system and a power supply that the winter can take away; a house on the main has a meter, a bill and, increasingly, a backflow device that makes the system closed and the water heater’s expansion tank mandatory.
What it costs (2026, national)
| Job | Range |
|---|---|
| Well pump replacement, overall | $975–2,821; about $1,898; $200–5,800 across types |
| Submersible / shallow jet / deep-well jet | $275–1,550 / $230–1,000 / $440–1,200 |
| Constant-pressure system | $2,000–5,000 |
| Pressure tank replacement | $800–3,800 |
| Labor / permits | $45–150 an hour, $250–1,000 total / $50–200 |
| Pump lifespan | 8–15 years with maintenance |
| Water softener / whole-house filtration / iron filter | not sourced — every cost page we tried was blocked or missing; ask for a quote |
| Backflow preventer install or annual test | not sourced — same |
The water
South Fork well water commonly carries iron and manganese: the stains are reddish-brown or purple-black on fixtures and in a pool once the water is chlorinated, and the fix is a sequestrant or an inline iron and manganese filter ahead of the house. The county health department runs a private-well testing program whose pages would not load for us, so we do not quote its terms; the plumbers we send you to test before they treat.
On the main, SCWA’s 2026 rate is $1.866 per hundred cubic feet, a $34.33 quarterly service charge, a flat $20 water-quality treatment charge on every bill since 2020, and a $2.694 conservation rate above 120 hundred cubic feet a quarter. SCWA is working toward “lead free by 2030” across nearly 400,000 accounts with an address-based service-line checker, and treats PFAS with granular activated carbon, in compliance with the federal standard ahead of the deadline by its own account. Its own backflow-prevention pages would not load for us; the New York plumbing code’s Section 608 matches the device to the hazard, and a plumber installs and tests it.
The winter
A well pump stops when the power does, and Isaias in August 2020 took out about 645,000 Long Island customers for up to eight days; in February that is a frozen house. A well house without heat, a pressure tank in a cold crawl space and a pump control box on an outside wall are the winter problems a plumber who knows wells looks for in November.
FAQ
Common questions
Is my Hamptons house on a well or town water, and does it matter?
Look in the basement: a meter and a Suffolk County Water Authority bill means the main; a pressure tank, a pump switch and no bill means a well. Nobody publishes the share of South Fork houses on each, and both are common east of the village centers. It matters in four ways. Cost: SCWA charges $1.866 per hundred cubic feet, $34.33 a quarter and a $20 water-quality charge; a well costs the pump ($975–2,821 to replace) and the power. Water: South Fork wells commonly run iron and manganese that stain fixtures once treated, and Long Island drinks from the sole-source aquifer under it either way. Winter: a well pump stops when the power does. Lead and PFAS: SCWA is replacing lead service lines by 2030 with an address checker, and treats PFAS with granular activated carbon; a well is the owner’s to test.
How do I winterize my Hamptons house?
Heat it or drain it, and tell someone. Heated: leave the thermostat at 55°F or more — the insurance industry’s “reasonable care” standard for an unoccupied house, and the fact pattern a 2024 New York court case turned on — open the cabinet doors under the sinks, insulate the exposed runs, shut and drain the outdoor lines, and put a Wi-Fi freeze alarm (from about $25) on the boiler and a smart shutoff ($579.99 for the one we could price) on the main. Drained: a plumber shuts the main, drains the supply lines, water heater, traps and outdoor lines and adds antifreeze; no Long Island company publishes the price, so ask. The pipes will see 15.7°F at Islip’s design temperature, and a burst costs $200–3,000 to fix and $1,000–4,000 in damage.
Read the full answer →How does Wainscott Plumbing Co. work?
You tell us about the house once: where it is, what is wrong or what you want done, and when. We put you in touch with one licensed, insured plumber who works your town and does that kind of work, and they call you within one business day, sooner for an emergency. From there it is their quote, their schedule, their warranty. It is free for homeowners; participating plumbers pay us a referral fee for the introduction. We are not a plumbing company, and we do not sell your details; the one company we send you to is the only one that gets your number. If the job is really a septic installer’s, a well driller’s or a heating contractor’s, we say so first. We cover 9 South Fork towns and 6 kinds of plumbing work.
Related
Other services
Emergency Plumbing & Burst Pipes
What a burst pipe costs to fix ($200–3,000, about $500 typical), what the emergency call adds, the first ten minutes before the plumber arrives, and why one home in sixty files a water-damage claim every year.
Water Heaters
A tank at $800–2,500 installed, a tankless at $1,400–3,900, a heat-pump heater at $1,200–3,500 with PSEG’s $1,200 rebate, what a propane or oil house should choose, and what the code requires.
Boilers & Heating Plumbing
Boiler replacement at $3,600–8,400 (about $5,900) by type and fuel on a fork that burns oil and propane, radiant floors at $6–20 a square foot, the combi disagreement, lifespans, and why there is no boiler rebate.
Winterization & House Reopening
Drain it or heat it: the 55°F rule insurers apply, what a winterization includes, the $580 shutoff and the $25 alarm, the temperatures the pipes will see, and the spring reopening.
Remodel Plumbing & Gas Lines
Repiping at $8,000–13,500, fixtures from $150 to $5,500 installed, drains and sewers, a gas line at $15–30 a foot for the range, grill and pool heater, the permits, and the outdoor shower nobody prices.
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