Boiler problem
Boiler leaking water?
Water under the boiler, a dripping relief valve or a wet floor near a radiator. What it can mean, what to do now, and who to call in the Utica area.
This is a referral line. When you call, you are connected with an independent local heating company.
Where the water is coming from matters
- Relief valve (a pipe running down toward the floor): pressure too high or a failing valve. See pressure problems.
- Fittings, pumps or valves: often a seal or gasket.
- The boiler body: a cracked section or heat exchanger, which often points toward replacement.
- Condensate line on high-efficiency boilers, which can also freeze.
Angi lists fixes for a leak around the boiler, such as a condensate line, expansion tank or valves, at $140 to $750.[source]
What to do now
Turn the boiler off at its service switch. If you can reach it safely, close the cold water feed valve. Keep the area dry, and take a photo of where the water is. Never cap or plug a relief valve.
Leaks by location
Relief valve. The pressure relief valve is usually on top or on the side of a hot water boiler, with a pipe running down toward the floor. If water drips from that pipe, the valve is opening because pressure is too high, or the valve itself is worn. High pressure usually means a waterlogged expansion tank or a fill valve letting in too much water. Do not cap or plug the relief pipe. It is a safety device.Around the base. Water pooling under the boiler can come from a leaking fitting, a failed circulator gasket, a condensate line on a high efficiency boiler, or, in the worst case, a cracked heat exchanger or section. A cracked cast iron section usually means replacement.From the condensate line. Condensing boilers drain acidic water through a plastic line to a floor drain or a pump. A disconnected or clogged line can puddle water. That is a minor repair, but keep the water off concrete and metal where you can.At a radiator. A drip at a radiator valve stem or union is a separate repair from the boiler. See radiator repair.Steam boilers and hidden leaks
On a steam boiler, a leak may not be visible. If your automatic water feeder runs constantly, or you have to add water to the boiler every few days, water is escaping somewhere. Common places are buried or concealed wet return pipes, which corrode from the inside, and radiator vents that let steam out instead of just air.
Constant fresh water is bad for a steam boiler, because it brings in oxygen and minerals that speed up corrosion. A slow leak caught early is far cheaper than a cracked boiler later. Older steam systems are common in Utica, where about half the housing was built before 1940.[source]
Leaks and electrical safety
Boilers have electrical components close to water: the control, the igniter, circulators and the low water cutoff. If water is spraying or pooling near those parts, turn off power to the boiler at its service switch, but only if you can reach it without standing in water. If you cannot, stay out of the area and call.
Once power is off, close the cold water feed valve to the boiler if it is within reach. That stops the system from refilling and keeps the leak from getting worse.
What to tell the company
Take a photo of where the water is coming from and the pressure gauge. Note whether the boiler is gas, oil, steam or hot water, the brand and model from the label if you can see it, and how long the leak has been going. Measure the puddle or estimate how much water you are mopping up per hour.
Those details let the company judge whether to come now or schedule. A dripping relief valve on a mild day is usually a scheduled repair. A steady stream with the house getting cold in January is not.
Also say where the water is coming from, whether it is clear or rusty, whether it drips only while the boiler runs, and what the pressure gauge or sight glass reads. Mention any recent work, such as a new expansion tank or a refill. Photos help if the company accepts them. These details tell the technician which parts to bring, and they can turn two visits into one. If you rent, tell them the name of your landlord and whether the landlord has approved the call.
When a leak means replacement
A leaking heat exchanger or a cracked section on a cast iron boiler is often the end of that boiler. If your boiler is past about 15 years old, Angi notes that is the point where replacement is often worth comparing.[source] Ask the company for a price on both. Our repair or replace guide and replacement cost guide help with the decision.
Low income homeowners aged 60 or older may qualify for the HEAP Heating Equipment Repair or Replacement benefit, which can pay up to $8,000 toward a replacement once approved.[source]
Protecting floors and belongings
Move anything stored near the boiler, especially boxes and electronics. Put down towels or a shallow pan under a drip, and use a wet vacuum on standing water once power to the boiler is off. If water has reached finished floors or drywall, photograph it for insurance. Many homeowner policies treat sudden leaks differently from slow ones, so dates and photos help.
Frequently asked
Is a small drip urgent? A small drip from a relief valve or fitting is usually a scheduled repair, but do not ignore it. Leaks grow, and water damages floors and boilers.My condensing boiler drips water from a plastic pipe. That is likely the condensate drain. Check that the line is connected and not clogged.Leaks after a cold snap
If a leak shows up right after a very cold spell, a frozen pipe may have split. Baseboard on outside walls, pipes in crawl spaces and lines near garages are the usual spots. A split pipe may not leak until it thaws. If you find one, shut off the boiler and the water feed, and call.
What to have ready when you call
- Your address, so the company can tell you if you are in their area.
- Boiler type and fuel if you know it: steam or hot water, gas or oil. A sight glass with water in it usually means steam.
- What it is doing, plus any code on the display or the reading on the pressure or temperature gauge.
Not sure about any of it? Call anyway. The company will ask the right questions.
Common questions
Is a small drip urgent?
A drip can get worse quickly, and water near electrical parts is a hazard. Call soon.
Does home insurance cover boiler leaks?
Sometimes for sudden damage. Check your policy.
Still not sure what is wrong?
Call and describe it. A local heating company will take it from there.
Call about your boiler(888) 835-0429