Great video. Spent last week unblocking multiple frozen condensate pipes at a school/college. Will be re-routing and insulating the 32mm pipes next week!

I was going to skip through your video but am glad I followed it right through. Last night my boiler desided to fault out after making some strange vibrating / throbing noises it being -3 deg. Knowing about the condensate problem with freezing, I checked the internal tank (Worcester Bosch CDI) and found it was totally full. My external drain to soil stack distance was only about 100mm with 21.5 plastic non insulated solvent weld pipe but still wasn't draining. I had to hacksaw through the pipe and redirect over flow into a bucket as an emergency temp fix. Note I had recently tried lowering the boile roperating temprature to ensure it was in condensing mode more often for fuel saving and this may be producing more condensate than it could cope with given the -3 outside temp. So it looks like upgrade to 32mm pipe and insulate. NB Previous system had worked ok for 3 years

Great video derek I do think that some installers don’t care as long as there paid for the install cheap and cheerful what ever happened to be proud of your installs

Hi Derek just to let you know brilliant video once again mate very interesting.

Interesting video so I’ll be checking the condensate pipework of mine & my elderly neighbours 👍

Playing catchup with your videos Derek and wow wow wow, keep em commin

Thanks Derek great video 🙏👍

brilliant video Derek

Another great video!

Good stuff Derek!

Such a brilliant video !!

Just had a Viessmann boiler installed. Condensate runs into a 38mm pipe connected to a soak away. There is only a small external exposed section, most of the external pipe is underground but the exposed section is not insulated. Engineer said there is no risk of freezing using 38mm pipe.

Thanks for the video mate

Yes they do and I speak from experience. That last frost we had screwed up my boiler for two days before I realised it was this pipe that had frozen and buggered up the heating system. Thawed it out and there you go working perfectly.

Good video very informative.

Derek, my installer fitted the condensate pipe externally and lagged it with foam insulation. Not only does it look unsightly on the outside wall but also forms a debris trap i.e. always full of leaves. Couldn't the pipe simply have been tapped into the bath waste adjoining the boiler cupboard at first floor level? Great vids btw! Cheers JL

Before the building regs changed I could not understand why my very long exterior condensate pipe in a first floor flat had not been insulated...it seemed sensible to me. Then when the ice has stopped my boiler I could not understand it even more. It was worth listening to your talk. I will have to get it insulated no question.

Interesting video. Didn’t know there was so much to know about condensate pipes and insulation. Thanks Derek. Much appreciated 👍🏻 Asian Jon. Training.

Lost count on how many overflow plastic pipe condensate pipes that froze without insulation about 14yrs ago! Standard check on all call outs! Fitted mine to internal washing machine waste👍

Ideal released a TB saying you can do it and recommend the Hotun tundish with the shield

Excellent 💐💐💐👍👍👍

I think Alpha combine the Prv and condensate in the boiler as well as Viessmann.

Worcester Bosch doesn't allow the condensate pipework to be run externally on their 2000 boiler unless a Condensure is used. I think their other boilers have larger condensate traps so don't require a Condensure.

Hi Derek, thank you very much for the information it’s very helpful, may I just ask, if our condensate pipe is not insulated and is made of thin possibly PP plastic and runs vertically down our outside wall over 15 feet into our gutter drain and turns around the house corner horizontally also at the top, the Worcester boiler was fitted in 2016 did the fitters not comply with the BS6798 regulations.

The condensate pipe from my Worcester Bosch boiler, which is located in my garage, has been disconnected externally and temporarily discharges into a plastic tub, internally, and emptied daily into an external drain.

19:35 Thank you - I was wondering if my new Viessmann had a blow off pipe missing after my installer left the old Ideal Logic pipe going outside unconnected to the boiler. Now I know.

Thanks 👍

Excellent excellent !

Excellent video. On my system, installed 2 months ago, the pipe taking away the condensate looks like 15mm polypropylene. Am I alright to use standard pipe insulation (all the water pipes in the loft have this around them) to protect the condensate pipe from freezing? There is a run of about 400 mm between the exit from the boiler to the rainwater downspout and a fall of about 20mm

When I had a new boiler my plumber refused to run the condensing pipe on the outside .

What’s the reason behind connecting to the wet part of the cast iron stack ?

My condensate goes into a neutraliser and then soaked away. Nothing goes down the drain.

Chris Taylor What if you use pipe greater than 32mm? Thanks Derek.

Hello , if a soak-away needs to be fitted does this need to be minimum 500 mm from the exterior wall ? Unfortunately this would be impractical in my situation. Can the soak away be closer ? Thanks

Hi Derek that’s a great video If the trap in the boiler is >75mm still require a trap by the soil stack? Thanks

Alpha also combined condensed and prv

I use armaflex for my outside pipe works a treat.

What about 40mm pipe.. Does it need lagging.

Just checked my housing association condenser boiler & it has a copper pipe for the condensate that doesn’t go to the drain 🤔

What’s your thoughts on Condensulate Xtreme?

Yeah very good video but you completely missed 1 scenario. When the outside condensate pipe is vertically downwards into a drain gulley. I understand it doesn't need to be lagged in this scenario??

I think I could say it (abs) but remembering is a other think

Condensing pipe not used push fit pipe is a right

Hi Does the condensate water have to be drained into the main waste water pipe. Can it be drained into the storm water pipe? Can it just be fed outside to drain into a hole in the ground?

The reduction of CO2 in the UK from gas boilers has been insignificant. The future reduction of CO2 from gas boilers will be insignificant. Over the last 20 years boilers have got better and will continue to get more efficient and will not contribute to CO2 reduction. It is impossible to measure.

One of the other problems with traps is they can dry out

👍👍

Using a condensate pump is good because it fires it out quickly, instead of a dribble.

Atag combine the prv and condensate

Did you actually say that you couldn't understand how the customer didn't notice the damage to the copper pipe which was used for the condensate going through the wall? Did you actually say that? Are you kidding? Home owners don't even see anything but the front of the boiler, let alone seeing the pipes. Home owners only want a heating system which works and they hand over wads of cash to people who they feel that they can trust to do the job properly. Sadly, most companies and workmen don't give a damn about procedures and quality of workmanship and the home owner does not have the knowledge to know if they are getting a bodge job. I recently had a boiler fitted and the workman rushed through everything as quickly as he could, without draining down, checking that air isn't trapped in the water system, bleeding radiators or checking them, repairing damage to the flue hole or even cleaning up after himself. The company didn't even bother contacting me to enquire how the job went, only to ask for payment of invoice.

Every new regulation means more cost to the customer if they use a genuine installer that's why more cowboys are getting work.

Alpha, viessman, and atag combine both

Daniel carragher

The reason why condensate boilers are so efficient is because when it gets to about - 3°C and below they stop working and therefore don't use any gas. Brilliant technology!!!!

Just to say, the reduction of CO2 emissions in the UK is mainly due to the exporting of much of our manufacturing capacity.

you only get half an hour protection at minus three unless it is fiberglass insulationn then its only a bit more protection mine runs out of the wall high up then into an open ended 32mm drain and underground to a soak away and even though thev east wind was leaving frost on my outside wall no freezing and has not done so for many years now, it is mostly the horizotal parts on these condensates that freeze and yes i have attended many frozen pipes as I was a plumber retiered now thank God

I defrosted my Dad’s last week.

It wuold hlep if you seplled it rgiht

Umair safdar

tomkat

Atag combine

👍🤓👍

Sorry but 26 minutes to answer the question do condensate pipes need lagging, way too long for a yes, no answer.

All gas safe "engineers" should plan for the day that gas boilers will become obsolete. It is not far away. Heat recovery systems and battery technology being developed by Tesla will be in every home.

Dear Derek. Get a life.