ONG Plumbing & Heating is Allentown’s local choice for plumbing, heating, cooling, and drain services. We live and work in the same community you do — which means faster response times, honest pricing, and work that’s done right the first time.
From the century-old row homes in the West End and Center City to the newer construction in the South Side and surrounding townships, we’ve worked in virtually every Allentown neighborhood. That experience means faster diagnosis, fewer surprises, and work that meets the City of Allentown’s code requirements without delays or re-inspections.
Plumbing emergencies don’t wait for business hours — and neither do we. ONG responds to emergency calls in Allentown 24 hours a day, 7 days a week, including holidays. With multiple trucks based in and around Allentown, our average response time for emergency calls in the city is well under 60 minutes. A real person answers every call — no voicemail, no answering service.
Common emergency calls in Allentown:
Many of Allentown’s older homes — particularly in established neighborhoods like the West End, Fountain Hill, and Center City — have drain lines that are decades old and prone to grease buildup, root intrusion, and scale accumulation. ONG clears drains with professional augering equipment and uses camera inspection to find the root cause of recurring blockages so the problem is fixed properly, not just temporarily cleared.
Cast iron drain lines were standard in Allentown homes built through the mid-20th century. While cast iron is durable, it corrodes and deteriorates over time — particularly at joints and horizontal runs where water sits. Cracks, scale buildup, and joint failures are common in cast iron lines that are 50 or more years old. Camera inspection is the most reliable way to assess the condition of your cast iron drain system before a failure occurs.
Allentown has a significant number of homes with original clay or Orangeburg sewer laterals that are well past their service life. Root intrusion, cracking, and partial collapse are common in these older lines — and many homeowners don’t discover the problem until they have a full backup. ONG provides sewer camera inspection, cleaning, repair, and full replacement for Allentown properties, handling all excavation and permit requirements in-house.
Many Allentown properties — particularly those built before 1970 — have original clay tile or Orangeburg sewer laterals connecting the home to the city sewer main. These materials deteriorate with age and are highly susceptible to tree root intrusion and physical collapse. If your Allentown home is more than 50 years old and the sewer lateral has never been inspected or replaced, a camera inspection is strongly recommended before a problem develops.
Allentown’s older housing stock makes camera inspection one of the most valuable services we offer in the city. Before recommending any sewer or drain repair, ONG runs a high-resolution waterproof camera through the line to see exactly what’s happening underground — no guesswork, no unnecessary digging. Camera inspection is particularly important for Allentown properties built before 1970, where original clay, Orangeburg, or cast iron lines may be deteriorating silently without any obvious symptoms yet.
We also provide pre-purchase sewer and sewer lateral inspections for homebuyers across Allentown — a smart investment in a city where older properties change hands frequently and sewer line condition is rarely disclosed upfront.
Many Allentown properties — particularly those built before 1970 — have original clay tile or Orangeburg sewer laterals connecting the home to the city sewer main. These materials deteriorate with age and are highly susceptible to tree root intrusion and physical collapse. If your Allentown home is more than 50 years old and the sewer lateral has never been inspected or replaced, a camera inspection is strongly recommended before a problem develops.
Whether your water heater has stopped working, is showing signs of age, or you’re ready to upgrade to a more energy-efficient tankless system, ONG handles water heater repair, replacement, and new installation across Allentown. Same-day service is available for most jobs and we carry the most commonly needed units on our trucks.
Lehigh Valley winters are no time to be without heat. ONG services, repairs, and installs furnaces, boilers, and heat pumps for Allentown homeowners and businesses. If your heating system fails, we respond fast — day or night — to get your home warm again as quickly as possible. Many of Allentown’s older homes — particularly the larger properties in the West End and historic neighborhoods — were heated with steam or hot water boilers that are still in service today. ONG’s technicians are experienced with older boiler systems and can service, repair, and replace them. If your boiler is aging or inefficient, we can also advise on modern replacement options that will significantly reduce your heating costs.
When summer temperatures climb in Allentown, a reliable air conditioning system isn’t optional. ONG installs, repairs, and services central AC systems and heat pumps for residential and commercial properties throughout the city and surrounding townships.
Planning a bathroom update in your Allentown home? ONG handles all the work involved in a full bathroom renovation — from relocating supply and drain lines to installing new fixtures, tubs, showers, and toilets. We work with your contractor or manage the full project, depending on your needs.
Learn More About Bathroom Renovations in Allentown
ONG Plumbing provides a wide range of residential plumbing services including leak repairs, drain cleaning, water heater installation, pipe replacement, and emergency plumbing services.
Yes, ONG Plumbing offers emergency plumbing services to quickly resolve urgent issues such as burst pipes, severe leaks, and overflowing fixtures.
Common signs include unusually high water bills, damp spots on walls or floors, low water pressure, or the sound of running water when no fixtures are in use.
Slow drains are usually caused by buildup of grease, soap, hair, or debris inside the pipes. Professional drain cleaning can safely remove these blockages.
It is recommended to have a professional plumbing inspection at least once a year to detect potential problems early and prevent costly repairs.
Yes, ONG Plumbing installs sinks, faucets, toilets, water heaters, and other plumbing fixtures to improve your home’s functionality and efficiency.
Turn off the main water supply immediately and contact a professional plumber as soon as possible to prevent further water damage.
This could be due to a faulty heating element, thermostat issue, or sediment buildup inside the tank. A professional inspection can identify the exact problem.
Most furnace installations can be completed within a few hours, depending on the complexity of the system and the home’s heating setup.
Avoid pouring grease down the drain, use drain strainers to catch debris, and schedule routine drain cleaning to maintain proper flow.
Yes, all technicians at ONG Plumbing are trained professionals and fully licensed and insured for your safety and peace of mind.
You can schedule a service by calling our team directly or by submitting a service request through our website contact form.
Major plumbing and HVAC projects are an unexpected expense for most homeowners — and it’s rarely one you can plan for. That’s why ONG Plumbing & Heating offers flexible financing options to help you get what your home needs without putting a strain on your budget. With payment terms available up to 36 months, you can spread the cost of your new water heater into manageable monthly payments and get the job done right without delay.
Ask about financing options when you call — we’ll walk you through what’s available and help you find a plan that works for your situation.
No pressure, no obligation. One of our licensed plumbers will assess your plumbing or HVAC problem, explain your options clearly, and give you a written estimate — completely free. Most jobs can be booked same day.