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Closing all the other valves doesn't help, rad still stays cold. Also this rad is mid way along loop. Rads before and after it get hot.all of this seems consistent with fact that placing a rad below circulation loop on a one pipe systems is fundamentally wrong as no way for the hot flow to be...

Hi, I have an issue with a single radiator on our heating system not getting hot. Would appreciate some advice. Setup is as follows: - 2 story house (submerged basement + above ground living floor). Solid concrete construction - Single pipe system, with a large bore (40mm) steel...

Thanks for all the helpful comments! We are planning to eventually ditch the 2nd existing (right hand) wc, and renovate the other one. So I guess Ill go ahead and just cap A, and connect soil with biggest radius bend I can fit. If there is a problem, which seems quite possible, I can punch a...

Hugh - thanks for thoughts. I was wondering if a good idea to put an AAV at A rather than just capping. However for the situation you are talking about I'm guess I'm likely to get positive pressure at A, so that isn't going to help.... What I could possible do is connect A to the new...

Unfortunately A falls inside a exterior wall on a bedroom, rather than the new ensuite. Also the vent section of pipe is only 80mm or so, and ripping that out would be a lot of work. I have buttwelding plate, which has worked fine with other 110 sections. But it's a good point - seems odd it...

Hi, I'd appreciate some advice on a soil pipe installation. Previous we had a two story building, with two W/Cs on upper floor, connecting to a simple direct vented stack (there are no secondary vent pipes). We've added a new floor, which will have another WC. One of existing W/Cs will be...

Thanks for the thoughts, however I've already bought the 26/20 lengths so I'm committed now. I'll look again at my runs as I can probably shorten them a bit more to reduce the delays and loss. Time will tell if it was oversized - I'll let you know when it's up and running what the delays are...

Hi Scott, Happy to help. I bought a load of Mepla pipe and parts, but haven't started fitting - will probably do this over next couple of weeks so will have some more experience then. One comment worth making now is that the pipe feels surprisingly rigid. As I bought 25m/50m coils I'm not...

I was using a very cheap (£40) 'Matrix' drill with a 12mm bit. http://www.swissm.ch/en/html/swissmLine/hammerdrills2.htm For the money it's actually ok, but for a job like this a clutch (which this doesn't have) seems vital. I recall nearly breaking my wrist when doing it. This Bosch...

Thanks for this, that is useful info. Increasinlgy seems like only three options: i) Lash out on a proper 2nd hand wet diamond rig, and try to recover money when reselling ii) Grit my teeth and pay the money for someone to do it. iii) Go back to the tested but slow process I used before -...

Hi, I am working on fitting out a new floor extension on a typical Swiss 'bunker style' from 1970s with reinforced concrete slabs. I need to drill some holes to take 110mm soil pipes, and heating loops etc through two existing concrete floors. These floors are 200-250mm thick, and have a mix...

Thanks for the helpful replies. Some thoughts/follow up questions: - Hot and cold are at least 4 bar - they could be higher but I don't have a easy way to check at present. It's a 200L unvented DHW tank, which is heated by an oil fired boiler. - DHW ring would be nice, but if I can keep...

Thanks that is useful as a starting point. It certainly suggests that 15mm internal diameter is adequate for getting a decent 12l/min shower. However I understand that a lot of other factors (length of run, number of joints, curves etc) will also impact this. My inclination is to oversize...

Hi, [Apologies if this has been requested before - I see quite a few pipe sizing questions but not much on plastic variants] I am about to install new hot and cold pipework for a new floor on a house in Switzerland. This will involve: - Running H & C supply up two floors from basement...