dpmiller

... once you've verified that it's failed and there isn't a supply/ control issue...

Correct fitment is indeed terminal box down. I don't think I've ever heard of one failing ever but I do know that the housing is light-gauge copper and the chances of unscrewing the element out of an elderly one are small. Hence some now being sold as a soldered-up unit. interesting note also that in their normal application- from the bottom to the top of the DHW cylinder- running the heater for a minute or two to get hot water moving means that you can then open a tap to a low flow rate and have continuous hot water. The willis basically bypasses the tank...

yep, done this a number of times at our current place.

nominal bore of a black-iron pipe of that size IIRC?

found the blurb... NIbrochure_0119.pdf datasheet-v5.pdf

lucky you're not in the RoI then, where modern MLCP pipes are still used in true imperial sizes... They're a kinda copper-coloured creamy brown...

round these parts, upright mounting would be a given. But if on its side then side connection up yes.

https://www.ebay.co.uk/itm/Willis-Jacket-Complete-External-Immersion-Heater-Prewired-fully-assembled/202416631247?epid=1588852290&hash=item2f20f8adcf:g:wAgAAOSwfEJeHIev even had MIs...

tanks stats/ pipe stats/ motorised valves?

also worth noting that some (ours anyway) are a soldered-up sealed unit so not much chance of a leak. Oh and the fitting at the top is a standard one so the pipe won't slide on in...

Yep.

Our Turkington has a SS secondary HE and I don't believe there are any limits on the return temp.

Dunno, they show it modulating 1.5 to 10kW, how else would you do that other than inverter?

Now that *is* an interesting looking piece of kit. Intersting also that they're using the Heatstream TS tank... edit scrub that. RED *are* Harlequin?

but other than poorly-set defrost parameters, is the COP of the average ASHP ever going to approach 1 never mind dip below it?

if the shoe fits...

I didn't see it answered already but... does a Laddomat have to be at the bottom of the circuit or not? The MIs for the 21-60 say yes, the 11-30 don't comment. But the larger one is fixed-orientation whereas the 11-30 can be fitted any shape..

not nationally, just GB.

In some of the newer plants, the pump doesn't run full time I believe. Certainly the air outputs are rested for periods. I'll hopefully be able to confirm this in the next couple of weeks with our Solido Smart.

PB is a lot springier/ more flexible.

Carrying on. More pipes, more cables, more plasterboard. Howdens stock door linings for CLS-sized studwork so gave them a try and have to say, pleasantly surprised with the quality and service. Got a door to go with, to square things up easily. Had a plasterer down to price some bits and bobs. Waiting for another crew to offer costings now. Plan is, to get the ensuite skimmed out so we can get a working bathroom and get shot of the portaloo. I won't miss the rental going out every month... Which leaves today. Loos don't work without drains, and we'd never got a final scheme together for the BCO. And based on the limited height we have between the current level, the FFL and the FGL I didn't want any nasty surprises re. pipe cover etc. So, called in to request a visit just to thrash out what works and suits. BCO arrives, makes approving noises about progress, doesn't care to look at any internal drainage and agrees to all the points of my (minimal) scheme. I asked if there's anything else he wants to see or check on before I start covering the GF ceilings and...no. Just a look at the safety glass in the french doors. So we're clear to complete the surface water drainage with no inspection required and he just wants a call to pop out and view the foul pipework once bedded. Onwards!

^ Dave's option FTW then.

Irfanview can work with a locked pdf using it's paint tools.

In our house, I do most of the cooking and neither of us are much for entertaining. Plus, we're moving from having a convenience store 400m away to somwhere a *bit* more isolated so shopping habits will change a bit. Still haven't decided on an island yet although if there is one it'll be more a visual cue and somewhee for breakfast I think. Kitchen is a broad U at one end of the open-plan room. Fridgefreezer (small daily freezer) on left, sink and dishwasher centre below the window, rangecooker in right-hand corner. Utility will have a sink, the washing machine and a large freezer. Walk-in larder off it for bulk storage.

I've got a Walabot, I must try it on the screed for a laugh...