Reliable Plumbing & Heating LI
Get a Free Estimate Call (631) 802-6255
Serving Nassau & Suffolk County for 28 Years

Long Island plumbing & heating, done right the first time.

Water heaters, boilers, leaks, burst pipes and waste lines, handled by a Deer Park team that has kept Long Island homes running for 28 years. Free estimates, upfront pricing, and a clean home when we leave.

Free estimatesUpfront pricing2-year labor guarantee
Reliable Plumbing & Heating technician standing beside the company's branded service van at a Long Island home
28 yrs
serving Long Island
2-Year Labor GuaranteeOn every water heater install
28yrs
Years of experience
Plumbing & heating on Long Island
2yrs
Labor guarantee
On water heater installations
$0
Free estimates
Upfront pricing, no hidden fees
30+towns
Towns served
Across Nassau & Suffolk
Our Services

Complete plumbing and heating, under one roof.

From a dripping pipe to a brand-new boiler, one call covers it. Every job starts with a free estimate and ends with a tested system and a clean home.

Leak Detection & Repair

We find the source fast and fix it before a small drip turns into a damaged ceiling or a high water bill.

  • Dripping pipes & fittings
  • Burst pipe repair
  • Water damage prevention
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Waste Lines & Drains

Slow drains and sewage backups diagnosed and repaired with durable materials, so you avoid a costly replacement.

  • Waste line repair
  • Sewage backup service
  • Slow & clogged drains
Learn more

Water Heaters

Tank and tankless installs and replacements from Bradford White and A.O. Smith, most finished in a few hours.

  • Tank & tankless models
  • Installed in a few hours
  • 2-year labor guarantee
Learn more

Boiler Repair & Installation

Fast diagnostics when the heat quits, and efficient new boilers that keep your home warm all winter.

  • No-heat diagnostics
  • Boiler repairs
  • New boiler installation
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General Plumbing

Pipe repairs, valves, fixtures and supply lines. The everyday fixes that keep your home running smoothly.

  • Pipe & valve repair
  • Shut-offs & supply lines
  • Faucet & fixture repairs
Learn more

Burst Pipe or Backup?

Water where it should not be, a sewage backup, or no hot water. Call now and we will get your home back to normal fast.

  • Burst & leaking pipes
  • Sewage backups
  • Fast response across Long Island
Call (631) 802-6255
Leaks, Burst Pipes & Waste Lines

Stop the leak before it becomes water damage.

Leak detection, burst pipes, waste lines and sewage backups.

Even a small leak can cause expensive damage. We pinpoint the source, explain what we found in plain English, and give you the price before any work begins. Slow drains and backups get the same care: we repair the waste line with durable materials, so you are not paying for the same problem twice.

  • Leak detection & repair
  • Burst pipe repair
  • Dripping pipes & fittings
  • Waste line repair
  • Sewage backup service
  • Slow & clogged drains

Spotted a leak? · Call now. The sooner it is fixed, the less it costs.

Plumber repairing a leaking sink drain and P-trap in a Long Island home
Free estimates Upfront pricing with no hidden fees.
Plumber installing water heater piping and controls in a Long Island basement
No hot water? Call now Most installs are finished in a few hours.
Water Heaters

Endless hot water, installed in a few hours

Tank and tankless water heater installation and replacement.

We help you pick the right model, then install it properly so you get steady hot water and lower energy bills for years. We install trusted brands like Bradford White and A.O. Smith, and most jobs are done in just a few hours.

  • New water heater installation
  • Water heater replacement
  • No hot water diagnosis
  • Tankless water heaters
  • Leaking tank assessment
  • Bradford White & A.O. Smith

2-year labor guarantee · If anything is not right, we fix it at no extra cost.

Boilers, Heating & General Plumbing

Stay warm all winter, with plumbing that just works

A failing boiler can leave your home in the cold. We diagnose it fast, repair it properly, and install an efficient new system when it is time to replace.

Boiler Repair

Fast diagnostics when the heat goes out, and repairs that get your system running efficiently again.

  • No-heat service calls
  • Circulators, valves & controls
  • Leaks around the boiler

Boiler Installation

High-performance boilers sized for your home, installed cleanly and tested before we leave.

  • Boiler replacement
  • Indirect hot water tanks
  • Final testing & cleanup

Not sure what is causing the problem? Describe what is happening and we will point you in the right direction.

Reliable Plumbing & Heating plumber with tool bag at a Long Island home
28 years on Long Island
Proudly serving Nassau & Suffolk County.
About Us

28 years serving Nassau & Suffolk County.

Reliable Plumbing & Heating is a Deer Park plumbing and heating company built on a simple promise: show up when we say we will, do the job right, and leave your home cleaner than we found it.

For 28 years, Long Island homeowners have trusted us with their water heaters, boilers, leaks and waste lines. You get a free estimate, an honest recommendation and a clear price before any work begins. No surprises and no hidden fees.

Upfront pricing, no hidden feesYou get a transparent quote before we start, and we only fix what actually needs fixing.
Free estimates & consultationsWe look at the problem and recommend the right solution at no cost and with no obligation.
28 years of experienceNearly three decades serving Nassau and Suffolk. Whatever the problem, we have solved it before.
Spotless when we leaveEvery job ends with final testing and a full cleanup. Your home is left exactly as you want it.
1Call usOr request a free quote
2Get your priceUpfront, no hidden fees
3Problem solvedTested and cleaned up
Our Work

Real Long Island jobs, finished properly

Recent water heater, boiler and piping work from homes across Nassau and Suffolk County. Tap any photo to see it larger.

Buderus boiler with Bock water heater and zone valves in a Long Island laundry room
Buderus boiler & Bock water heater
Indirect-fired water heater installed beside a boiler in a basement
Indirect water heater & boiler
A.O. Smith gas water heater installed in a utility closet
A.O. Smith gas water heater
Bradford White gas water heater installed in a closet
Bradford White water heater
Indirect hot water tank with new copper piping beside a boiler
Indirect tank & copper piping
Indirect hot water tank installed in a basement
Indirect hot water tank
A.O. Smith water heater next to a cast-iron boiler
Water heater & boiler room
Gas water heater with expansion tank and boiler piping
Water heater with expansion tank
A.O. Smith ProLine gas water heater installed in a basement
A.O. Smith ProLine install
Indirect hot water tank installed in a narrow basement
Indirect tank installation
Indirect tank with circulator pumps, expansion tank and copper piping
Boiler circulators & piping
Boiler and gas water heater replaced side by side
Boiler & water heater upgrade
New boiler with expansion tank and copper supply lines
New boiler installation
Oil-fired water heater installed with new burner and piping
Oil-fired water heater
Get a Free Estimate Call (631) 802-6255
Service Areas

Based in Deer Park. Serving Nassau & Suffolk County.

30 towns across Long Island and counting. Tap a town to see where it sits and how far it is from our Deer Park shop.

Home base: Deer Park, NYSelect a town to see the distance
Nassau CountySuffolk County
30 towns across Long Island · tap any town to see it on the map
Don't see your town?We cover the surrounding areas too. Give us a call and we will let you know right away. Call (631) 802-6255
Free Estimate

Tell us what's going on

A new water heater, a boiler that will not fire, a leak or anything else. Send us the details and we will get back to you with a free, no-obligation estimate. For anything urgent, call us directly.

Request your free estimate

We only use your details to prepare your estimate. See our Privacy Policy.

FAQ

Questions, answered

We are based in Deer Park, NY and serve homes across Nassau County and Suffolk County, including Bayshore, Brentwood, Commack, Dix Hills, Smithtown, Huntington, Massapequa, Merrick, Levittown, Patchogue, Babylon, Melville and the surrounding towns.

We have been serving Nassau and Suffolk County for 28 years. Whatever the problem, there is a good chance we have fixed it many times before.

No. Water heaters are a big part of what we do, but we are a full plumbing and heating company. We also handle boiler repair and installation, leak detection, burst pipes, waste line repairs, sewage backups and general plumbing.

Yes. We install and replace both tank and tankless water heaters, including trusted brands like Bradford White and A.O. Smith, and we help you choose the right one for your home and budget.

Most water heater installations are finished in just a few hours, so your hot water is back the same day.

Yes. Every water heater installation comes with a 2-year labor guarantee. If anything is not right, we come back and fix it at no extra cost.

Yes. We assess the job and recommend the best solution at no cost. You get a transparent, upfront quote with no hidden fees before any work begins.

Always. We test everything to make sure it works perfectly, then leave your home clean and spotless.

Still have a question? Call us or request your free estimate. We reply fast.

Plumbing or heating problem? One call fixes it.

Water heaters, boilers, leaks, burst pipes and waste lines, handled by a Deer Park team that has served Nassau and Suffolk County for 28 years.

(631) 802-6255
Free estimates · Upfront pricing
Get a Free Estimate Call Now (631) 802-6255