Central Heating pipework

[Des Jennings]

I have attached an image of external pipework at the front of my house. I noticed a couple of days ago that water was dripping from one of the pipes whilst the boiler was heating hot water. Should I be concerned?

Thanks.

 

[cross thread]

Yes it needs looking at,it’s a safety discharge pipe from boiler or unvented cylinder

 

[Des Jennings]

Yes it needs looking at,it’s a safety discharge pipe from boiler or unvented cylinder

Thanks. Do I take it that overheating is involved and heating is not been switched off?

 

[Elkato531]

If you have a megaflo cylinder there should be a label on it about how to replenish the air gap. Any other issue will need to be looked at by someone qualified to work on unvented cylinders.

 

[Madrab]

Is it the larger or the smaller of the pipes? If you do have an unvented HW cylinder and it's the larger of the pipes that's dripping/running then get the cylinder serviced.

If it's the smaller pipe then you need the boiler serviced.

 

[Johntheo5]

Are you sure that it's from one of the the PRVs and isn't just condensate?., there seems to be a lot of bleaching of the brickwork underneath.

 

[Des Jennings]

Are you sure that it's from one of the the PRVs and isn't just condensate?., there seems to be a lot of bleaching of the brickwork underneath.

When the hot water was on I could here a lot of water going down the condensate pipe but I assume that is nothing to do with the water discharging through the copper pipes outside, just a coincidence.

 

[polesapart]

The two copper pipes are safety discharge pipes as identified by the first three respondents.

 

[Johntheo5]

These two pipes look "plastic" to me?.

 

[Des Jennings]

These two pipes look "plastic" to me?.

I will check in the morning.

 

[Johntheo5]

If you run the CH only for 5 mins or so (HW off) and the drip stops then points to a cylinder expansion problem.

 

[Des Jennings]

If you run the CH only for 5 mins or so (HW off) and the drip stops then points to a cylinder expansion problem.

Thanks for that.

 

[dilalio]

These two pipes look "plastic" to me?.

They look like copper to me...
22mm left, 15mm right.

Plastic would have a stepped ridge on fitting - not flared.

 

[Des Jennings]

They look like copper to me...
22mm left, 15mm right.

Plastic would have a stepped ridge on fitting - not flared.

I've checked this morning. They are copper pipes and the sizes you suggest.

 

[dilalio]

I've checked this morning. They are copper pipes and the sizes you suggest.

They are discharges for expansion.
Need to get the UV serviced.