Condensate pipe

beduth

neilmcl wrote: »

I've never seen a 35mm condensate pipe and quite surprised that it freezes, one of the reasons boiler manufacturers recommend going up to 32mm is to prevent freezing.

My outside condensate pipe is 35 mm,and it froze last year. I have lagged it now. Lagging was from plumbers merchants cheap, only £2:80 per 2 m length. So hope it does the job this year.

Gizmo21

beduth wrote: »

My outside condensate pipe is 35 mm,and it froze last year. I have lagged it now. Lagging was from plumbers merchants cheap, only £2:80 per 2 m length. So hope it does the job this year.

Hurrah, someone with the same size condensate pipe as me Haha!! Brilliant, thanks, I'll have a look at our local one, we've only looked at d.i.y stores such as B&Q.

beduth

Gizmo21 wrote: »

Hurrah, someone with the same size condensate pipe as me Haha!! Brilliant, thanks, I'll have a look at our local one, we've only looked at d.i.y stores such as B&Q.

If I remember correctly diy stores only went up to 22 mm, I went to stuart plumbing supplies ( midlands based ) but would expect most plumbing merchants to stock 35 mm.
Had a slit down so you could just open lagging with fingers and pop over pipe, took 10 min 😁👍

Ectophile

I got some exterior grade pipe lagging from a plumbers merchant. I tied it on with tie wraps.


It doesn't stop the end of the pipe freezing, though. If I ever get daytime temperature below freezing, I have to keep popping out with a kettle of hot water to defrost the end of the pipe. I deliberately left the last few feet un-lagged to help that.

Mr.Generous

To anyone with this problem just a word of advice. Condensate is acidic, the process recovers heat from combustion so when thawed it gives off gasses. You should always defrost from the outside back towards the boiler to avoid this gas going into the house. It will bubble back up through the condensate trap in the boiler if you just pour hot water onto the blockage. Not a massive risk, but better to do it that way.

Gizmo21

beduth wrote: »

If I remember correctly diy stores only went up to 22 mm, I went to stuart plumbing supplies ( midlands based ) but would expect most plumbing merchants to stock 35 mm.
Had a slit down so you could just open lagging with fingers and pop over pipe, took 10 min 😁👍

Yep, b&q went up to 28mm, and Wickes only went up to 22. It sounds like we'll have more success at the plumbing merchant then. Thanks so much

Gizmo21

Ectophile wrote: »

I got some exterior grade pipe lagging from a plumbers merchant. I tied it on with tie wraps.


It doesn't stop the end of the pipe freezing, though. If I ever get daytime temperature below freezing, I have to keep popping out with a kettle of hot water to defrost the end of the pipe. I deliberately left the last few feet un-lagged to help that.

Well that's just typical it doesnt stop the end from freezing, but at least the lagging was still some help. Better to be lagged than not at all I think. Thanks Ectophile:)

Gizmo21

Mr.Generous wrote: »

To anyone with this problem just a word of advice. Condensate is acidic, the process recovers heat from combustion so when thawed it gives off gasses. You should always defrost from the outside back towards the boiler to avoid this gas going into the house. It will bubble back up through the condensate trap in the boiler if you just pour hot water onto the blockage. Not a massive risk, but better to do it that way.

Noted Thank you.