Where is condensate pipe on boiler?

Last Update: May 30, 2022

This is a question our experts keep getting from time to time. Now, we have got the complete detailed explanation and answer for everyone, who is interested!

Asked by: Brianne Dooley
Score: 4.5/5 (11 votes)

Look under the boiler to see if there is a plastic pipe - It's usually white and around 20mm (about ¾”) wide. The pipe should run to the outside of your home and should always run into a drain. An example of a condensate pipe is shown below. The condensate pipe is the diagonal pipe running along the side of the house.

How do I know if my condensate pipe is clogged?

Signs that your condensate trap is blocked can include a faint gurgling noise coming from your boiler, or an unusual sound coming from the flue outside your home. If the trap does need to be cleaned, your heating engineer will remove it, rinse it out thoroughly, refill it and then refit it.

What is a condensate pipe on a boiler?

The condensed water vapour (now just water) then leaves the boiler through something called a condensate pipe. The condensate pipe is usually a white PVC-U pipe, similar to one you may find on a washing machine or sink waste pipe which usually goes outside into a drain.

Does my boiler have a condensate pipe?

Luckily, there is an easy way to tell which pipe is the boiler condensate pipe - it will be the only plastic pipe connected to your boiler. The pipe is usually 22mm in diameter if connected to the drainage system or 32mm if it is connected externally.

How much water should be coming out of a condensate pipe?

It's completely normal for your AC to drain 5-20 gallons of water outside of your home (via the condensate drain).

How to Fix a Frozen Boiler Condensate Pipe

23 related questions found

Can a condensate pipe go into the ground?

Essentially, a condensate pipe takes waste water away from the boiler. ... It can be taken to the outside, run internally, or even pumped through a 10mm plastic tube rising vertically, then to a drain.

Why is water coming out of my boiler overflow pipe?

Boiler overflow pipe

This valve releases water if the system builds up too much pressure. ... Your boiler's overflow pipe may leak water if: The boiler has built up too much pressure due to the expansion vessel failing or losing its charge. The pressure relief valve is not seated correctly, causing water to pass by it.

What size is a boiler overflow pipe?

Internal condensate discharge pipework must be a minimum of 19mm ID (typically 22mm OD) plastic pipe or as per manufacturer's instructions and this should “fall” a minimum of 45mm per metre away from the boiler, taking the shortest practicable route to the termination point.

How do you fix a clogged condensate pipe?

In Winter, your condensate pipe may freeze and become blocked. This can easily be fixed by using a hot water bottle, or pouring warm water over the pipe itself.

What happens if condensate line is clogged?

A clogged condensate drain line will trap water in your air conditioner. As a result, the evaporator coil will eventually turn to ice. The moisture in the drain line can also freeze, which will cause your air conditioner to turn off. But before it does, it'll likely suffer some damage.

What comes out of a condensate pipe?

Condensate is what gets produced when your boiler is being used to heat your home or produce hot water. ... Once enough heat is produced from this vapour, it's condensed back into water form. After this water has been collected, it gets expelled out the condensate pipe.

Is the condensate from boiler toxic?

Exhaust. The condensate expelled from a condensing boiler is acidic, with a pH between 3 and 4. ... The acidic nature of the condensate may be corrosive to cast iron plumbing, waste pipes and concrete floors but poses no health risk to occupants.

Does a condensate pipe need a trap?

Building regulations require a trap to be installed in the condensate pipe from the boiler. If it goes straight to a gully or rainwater hopper a water seal of at least 38mm is required. If connected to another waste pipe, the water seal must be 75mm to prevent smells entering the dwelling.

How much condensate does a gas boiler produce?

An efficient condensing boiler will generate around 2 litres of condensate water an hour at a temperature of around 30-40°c. This needs to be safely disposed of, within the buildings waste water system.

Does a gas boiler have an overflow pipe?

Boilers also have a pipe that resembles an overflow pipe consisting of a pressure relief valve. This valve releases water when the system is under too much pressure. The pipe has its end outside your house to prevent any flooding. But the valve only flows when there is a problem in the system.

What does a dripping overflow pipe mean?

An overflow pipe leaking or dripping is due to water entering a cistern when it shouldn't, either via the ball valve or via the outlet pipes at the bottom. In most cases, it's due to a faulty ball valve.

Is a leaking boiler an emergency?

My boiler is leaking water

If you do, it might be a sign that an internal part has failed. While it's not necessarily dangerous, you should switch off your boiler to prevent your electrics short-circuiting and to stop water damaging your home or belongings. Don't try to fix a boiler leak yourself.

What acid is in condensate?

Condensate contains different types of acids that are corrosive to many materials and contain concentrations of nitric, nitrous, sulfuric, and sulfurous and hydrochloric acids. These acids can become more concentrated by repeated condensing and evaporation on heat exchangers and flues.

Is a condensate neutralizer necessary?

Yes, even if you don't have to use one. Typical condensate from a condensing boiler has a pH level of 3.2 to 4.5, which is acidic enough to leave stains, kill shrubs, and eat away cast iron drainage systems. So remember to include a condensate neutralizer when designing a system. ...

How do you know if your boiler is condensing?

If you can see the steam coming from the flue through an external wall (or roof), and if you also have a white plastic pipe leading to a drain, this will certainly be from a condensing boiler.

Does condensate water smell?

The condensate tray contains a drain. When the drain is flowing properly, the moisture is moved through through the drain, into the plumbing system or out of the house. ... As water stands in the tray, dust and debris fall into the standing water. Eventually, bacteria, mold and fungus form and emit a foul smell.

Can't find my condensate pipe?

If you can't see a pipe coming through the wall, you may have an older type of boiler and will need to call a heating engineer. Likewise, if your boiler is mounted higher up, it's dangerous to get to, so you'll need to call a registered heating engineer. Now, you need to thaw out the pipe, clearing the ice blockage.

How do I stop my boiler condensate pipe from freezing?

How to prevent your condensate pipe from freezing
  1. Cover your external condensate pipe with foam pipe insulation.
  2. Leave your heating on overnight at a lower temperature to keep the condensate warm. ...
  3. Set your boiler thermostat to a higher temperature.

Will pouring hot water down the drain unfreeze pipes?

In most cases, you can unfreeze a frozen drainpipe by pouring hot water down it. Fill a pot with a half-gallon of water, and heat it on the stove. When it begins to boil, carefully remove it from the stove and slowly pour it down the drain. This may be enough to thaw the ice and completely clear your drain.