What are the pipes connected to a combi boiler?

A combi boiler gets its water supply from a 15 mm copper pipe fitted to the mains in the property.

Where does the condensate pipe go?

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.

Where is the condensate pipe on a combi boiler?

The condensate pipe runs from the boiler to a suitable existing waste pipe system, or external drain pipe. If it is connected to an external drain pipe, it will be found outside your property leading out from your boiler.

Do combi boilers have condensate pipes?

SInce 2005, it has been a UK requirement that all gas combination boilers use condensing technology to increase their efficiency. The boiler condensate pipe is the pipe that allows this water to be drained from the heating system and disposed of with your household waste water.

What size gas pipe do you need for a combi boiler?

22mm
Most gas combi boilers require a 22mm supply pipe to be fitted from the combi boiler to the meter. It may also have to be upgraded to 28mm and even 35mm in sections if the gas route is a particularly long distance, has many bends and turns in the route it takes or services many appliances.

Can I use 15mm pipe for central heating?

From the limiting factors, it is estimated that 15mm copper pipe can handle 13,620 BTU; so 15mm can easily cope. Then looking at the pipework for the hall and lounge radiators, this has to carry the heat for both radiators (2751 + 4687 = 7,438 BTU), so again 15mm pipe will cope.

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

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

Does a boiler have an overflow pipe?

Combination boilers have a pipe that’s similar to an overflow pipe, called a pressure relief valve. 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.

How do I know if my pipe is condensate?

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.

Can a condensate pipe go into the ground?

All modern condensing boilers require a condensate pipe to run to a suitable drain. There’s no way round it, so finding a suitable solution before installation is absolutely imperative. It can be taken to the outside, run internally, or even pumped through a 10mm plastic tube rising vertically, then to a drain.

What size combi boiler do I need for a 3 bedroom house?

As a rough estimate most flats, apartments and smaller houses, with up to 10, average size radiators and 1 bathroom* will require a 24 to 27kw Combi Boiler. For a medium to large 3-4 bedroom house with up to 15 average size radiators, 1 bathroom and an ensuite* bathroom, a 28-34kw Combi Boiler would be installed.