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No, all electric. I can use the feed from a redundant 9kw shower. I thought / hoped the lower immersion would heat the cylinder top to bottom instead of stratification.

Microbore is a crap hangover from the 70s... noise in the rads is often excessive pump pressure due to the small pipework. Try turning the pump speed down.

Rads should be under the window. A vertical rad is usually a style/lack of space compromise. Putting the rad anywhere but under the window risks creating a thermocline where the cold air moves down from the window and up from the rad, creating an uncomfortable circulation. Don't know about the 30%.

Bump... so do I get more hot water from a dual cylinder?

100,000 btu boiler, pretty big. From the rad sizes, calculate the heat requirement. Add the ufh. Add whatever for pipe losses depending their size and insulated or not.. Add 15000 btu for hot water Add 20% for margin Is the boiler still big enough?

But... a Durgo only prevents the water seal being siphoned out of the pan when the loo is flushed. It does not vent back-pressure, which is what the OP is reporting. The stack pipe would still need to be connected to a vented stack.

Yes. Bear in mind that pongs will emerge from the top of the vent, so it needs to terminate someone out of range, so to speak.

That suggests that there's pressure in the sewer from other toilets upstream. Perhaps a neighbour has added something, or new builds... A vent would disperse the pressure, as it is, it's trying to vent through your loo.

What you have there is an ingenious but horrible bodge. That corrugated thing.. looks like it was borrowed from a fan ducting. And is it really on the wonk or is it the photo..... It's only because the fall is so short that it doesn't suck all the water from the bowl. It needs a stack pipe run...

I plan to put in a deeper bath. Which holds more water. Up to 90 gallons. The purpose of a deeper bath is so I can have a nice wallow, which I can't in the present one. So the standard cylinder 36" x 18" that holds around 25 gallons will no longer be large enough. Or will it...? I could put a...

Interesting, thankyou. My experience of using oils in autumn - mainly Sikkens AZ gloss, and I'm going back ten years here - is that they take forever to dry. Days. I never tried adding terebene driers. Last Friday I applied some Bedec waterbase as I mentioned, and it dried overnight. I wasn't...

A local craft group is making a large mosaic using bits of tiles on three sheets of 6x2 ext ply. Using PVA to stick the tesserae. I think the ply should be primed with PVA or the mosaic will eventually fall off. What do you think?

If you don't like the wallpaper, strip it and repaper with something you do like. Walls don't have to be painted.

A small cutting fitch

It's quite usual in a Period house to have polished/stained banister rails & newel posts, and painted spindles. So I would not be trying to stain them, even if it were possible to stain over paint.

Bedec MSP would do the job, no primer needed. I used some of their Barn Black outside today, but min temp is 50F/10C so it won't dry as fast as usual. If you have horizontal surfaces you would need to keep the dew off. Worse if north facing. Forget oil paint at this time of year.

We have exactly the same situation, although with proper leaded lights not plastic windows.... The mould is there because the stone is cold and moisture condenses on it, rather than the glass as it would have done with the original single glazing. Clean it off occasionally with a small amount...

The kickspace heater is a Myson KSU500E, with fan of course, 2kw but I disabled the second element and run it at 1kw because the time switch is not rated for 2kw. The stat was NOS, so new but not as we know it. I guess 60s from the design. It might be faulty of course. Sometimes stuff is NOS...

OK, thanks, I'll try that. There should be no wear in the stat as it was new, but perhaps it needs some lubrication. I'll take it off and have a look. Yesterday I bought an even older one on eBay so I have that as a reserve....

Not sure if this should be in the Electricals board, anyway... So, being a fan of electrical antiquities, two years ago I installed this NOS Ekco room stat to run a 1kw kick heater. Probably 1960s. Used it with a clockwork Horstmann time switch. The wiring options for the stat were with and...