Enjoy endless hot water and higher efficiency with professional tankless water heater installation and repair by Extreme Plumbing, serving Haverhill and Essex County.
Call (978) 352-7900 • Same-day service often availableCorrectly sized units with code‑compliant venting, gas line sizing, and condensate management for long life and peak efficiency.
Swap older tanks or undersized tankless units for modern condensing models with recirculation and smart controls.
Diagnostics, part replacement, and annual descaling to maintain performance and warranty compliance.
Faster hot water at fixtures with integrated or add‑on recirculation pumps and timers for comfort and savings.
Priority response for no‑hot‑water calls, leaks, and error codes.
| Service | Typical Range (USD) | Notes |
|---|---|---|
| Non‑condensing tankless replacement | $2,800–$4,200 | Reuse venting where code allows; minimal gas upgrades. |
| Condensing tankless installation | $3,800–$6,500 | New PVC venting, condensate drain, possible gas line upsizing. |
| Recirculation system add‑on | $450–$1,100 | Dedicated return or crossover kit; model dependent. |
| Annual flush/descale | $180–$350 | Protects heat exchanger and maintains efficiency. |
Pricing varies by capacity (GPM), venting route, gas supply, hardness, and site conditions. Free, no‑pressure estimates.
Sizing is based on simultaneous fixtures and incoming water temperature. We right‑size GPM and BTU for your home and usage.
We install both. We’ll verify fuel availability and venting routes, then recommend the best model for performance and efficiency.
Yes. Properly sized condensing models deliver steady hot water even with low inlet temps, with freeze‑protection features when needed.
Annually for most homes, more often with hard water. We can install isolation valves and filters to make service quick and clean.
We help document eligible high‑efficiency installs and provide paperwork for energy rebates when available.
Haverhill homeowner
Flawless Navien install. Quiet, efficient, and the recirculation gives us hot water fast at every tap.
Condo owner
They converted from a 50‑gal tank to tankless in one day and handled all permits. Clean work and fair price.
Property manager
Reliable maintenance partner. Annual descaling has kept units running like new.
Call (978) 352-7900 or request service online. We serve Haverhill and the surrounding Merrimack Valley.
Call (978) 352-7900