• Welcome to PlumbersForums.net - The international free plumbing advice forum. Professional plumbers sharing advice with fellow plumbers and DIY alike. Register for free today! - Checkout the Plumbing Advice forum and then our Plumbing Videos area which still needs populating.

Search results

  1. B

    leak on new plate exch

    It was blocked with debris on the heating side. The DHW was poor and caused banging and overheating. There was also a gradual pressure loss eventually needing top ups everyday. The system was flushed prior to changing the plate exchanger. The cleaning/flushing somehow fixed the pressure loss...
  2. B

    leak on new plate exch

    There is an expanded picture of the boiler here: Temporary URL generator - https://www.temporary-url.com/8AEF When you say the fibre washer, do you mean part 410? He replaced part numbers 400 and seals 403 X 4. The corrosion is visible on the pipe coming down from the bottom left hole on the...
  3. B

    leak on new plate exch

    The boiler is a baxi combi The pipe underneath on the left side of the plate exhanger where the DHW hot water comes out has green corrosion and signs water has dripped on the floor below it. The plate exchanger was replaced a few months back so is nearly new. The pipe was not green before the...
  4. B

    Is powerflush really any better than chemical plus mains flush? (before boiler repair)

    Due to COVID the engineer diagnosed the faults over the phone. I told him what is typed below. He will confirm the faults when he comes to carry out the work next week. A bit more background: About 2 years ago, the plate exchanger got blocked on the heating side with flakes/crumbs of black...
  5. B

    Is powerflush really any better than chemical plus mains flush? (before boiler repair)

    It is grey, but it is definitely the barrier version. A few years ago, I had a section under the bathroom replaced with copper because it will not be accessible after the bathroom floor is down. The system wasn't flushed after that, only refilled but it was not a huge area.
  6. B

    Is powerflush really any better than chemical plus mains flush? (before boiler repair)

    15 years old but it has had light use.
  7. B

    Is powerflush really any better than chemical plus mains flush? (before boiler repair)

    Hello, BEFORE I cleaned the system last year with a mains flush. There was a little inky stuff and a bit of sludge at the very end when I emptied out the rad I took off the wall, but no rads have ever had cold patches. Most pipes are hep20 but I had small section replaced by copper 2 years ago...
  8. B

    How to drain down to remove towel rail AND valves?

    Thanks. Is it possible to just drain upstairs and not drain the boiler or is there no way to know when to stop draining unless you empty the whole lot?
  9. B

    How to drain down to remove towel rail AND valves?

    Towel rail needs to be removed so that new flooring can fit over pipes. Therefore the whole thing needs to come off valves and all so that the pipe ends coming up from the floor are exposed. The bottom compression nut and olive can stay on each pipe as there will be big enough holes in the...
  10. B

    Gas fire closure plate

    Hello, I have a gas fire which has been unused for some time. It has a rectangular vent protruding from the rear. There used to be a closure plate with a rectangualr slot but this is now lost. The closure plate for this fire is no longer available as a spare part. Q1. Do new gas fires...
  11. B

    Cylinder pipe sizing for new hot water system

    Sorry, I meant to say he was recommending a VENTED traditional system with a standard cylinder (albeit with 2 heat exchangers) and a header tank in the loft. I got muddled up with all this plumbing lingo vented unvented etc. Sorry for confusion, does this change any of your answers?
  12. B

    Cylinder pipe sizing for new hot water system

    Thanks for your answers. I think he meant a traditional system with a header tank in the loft, but it seems I can have this tank + cylinder just to supply hot water and carry on with the cold as is. RE Q2, the longest 15mm branch off the 22mm hot pipe would be about 4m to reach a basin in the...
  13. B

    Cylinder pipe sizing for new hot water system

    Current system: Combi boiler with direct cold water all on 15mm pipes. 28mm outside diameter lead pipe from supply converted to 15mm copper to kitchen tap and then onwards to bathroom. Proposed new system: No more instant hot water from combi. Replace with hot water cylinder with 2 heat...
  14. B

    15mm flow and return, plate exchanger blockage?

    Thanks for the replies. The system has been heating the house OK for years so it will be a pain to re-do the flow and return unless there is a good reason. Back to my original question... Is there any theory why having too small pipes could make a difference to how debris / sludge, etc move...
  15. B

    15mm flow and return, plate exchanger blockage?

    Thanks for the answers. Looks like I will have to ask the engineer to replace the pipes that will become inaccessible under the new floor with 22mm copper. That leaves the rest of the system in 15mm hep2o which will have to be sorted another year. That leads to another question. The...
  16. B

    15mm flow and return, plate exchanger blockage?

    Of course. I am asking here only to be better informed. Due to other works, the pipes at the start of branch 3 will soon become permanently inaccessible so I want to get them changed from hep20 to copper for peace of mind. I want them done right and done to last. The question is whether they...
  17. B

    15mm flow and return, plate exchanger blockage?

    It is a Baxi platinum combi 28he condesing boiler. It was originally fitted with a salamander SESI device which was replaced with a magnetic scale inhibitor a year ago. There has always been inhibitor fluid in the system which is about 12 years old. The heating is working fine although the...
  18. B

    15mm flow and return, plate exchanger blockage?

    The combi boiler has 22mm flow and return outlets but they are immediately reduced to 15mm as they come out the boiler. After the pipes come out of the boiler, they split off into 3 branches. Branch 1 is for a single radiator only. Branch 2 feeds about 9000BTU diownstairs and branch 3 feeds...
  19. B

    Fittings to branch into cast soil pipe?

    Thanks for the replies. I went to the pipe merchant and they showed me a timesaver coupler. It was made from 2 halves of metal with a rubber insert and tightened up with bolts on each side. My only concern is that the old pipe is 102mm and the new one is 110mm, so how will it join both...
  20. B

    Fittings to branch into cast soil pipe?

    I would like to add another WC about 2m to the right of existing WC. The existing soil pipe has only one WC (coming out the wall straight into the soil pipe) and is a straight vertical cast iron 4 inch pipe with a vent at the roof. My plan is to go out the wall with the new WC and then go down...
Top