Nickfromwales

You'd be shot if you didn't, ma' man.... How long has this worked for, to date, without issue?

No you don't. The (then higher) fixed flow temp will arrive at the TMV, and the UFH will see zero change in circumstance or performance. The FF rads will receive x degrees higher flow temp and actually do something. The rads go on TRV's to manage the difference in the size of the spaces that they are now able to satisfy. You balance and attenuate the lift in flow temp degrees at a time, until the happy medium is achieved.

You don’t have to keep saying sorry lol. Water hammer noises are difficult to locate / fault find, but as said the diverter (ahem) valve does a smooth transition, so would not be the usual suspect.

:reaches for drinks cabinet: 🙃🤣.

Yup. When we feather dry sand and cement screeds from 10mm to 30mm, there needs to be a very particular primer used, one iirc that stays tacky unlike PVA or SBR, to stop the layer from separating from the slab. From 10mm to 0mm you then use SLC.

From what I gather, and as per Dave above, there was a working light here before.

Yup. Defo the culprit if it’s not a diverter!!

Yup. If the old one worked, this one can be made to work. Light needs to come off and we need to see some pics, whilst I’ve still got hair! 🙃

Ah! I think you have the wrong valve. Google says this is a mid-position valve, and you should have a diverter valve. Can you confirm you have a mid vs diverter plz?

Pumps usually last a minimum of 10 years in a typical household, often much longer. Good to hear it’s sorted, but how old was the pump they replaced? Did they leave the old one there, and did they offer an explanation as to why they thought the old one had failed?

Ah. “No”. Whoever told you that needs to lay off the crack pipe. Sorry for the misunderstanding.

Can you post a pic of the internal piece that you need to connect to please? I’ve seen a few variations of these so want to advise according to what you have there.

That can be made to work, but I’d need more info and to understand the way it’s been plumbed / pumped / operated etc to see if hydraulic separation needs to be considered in this conversion. Assuming it’s just the OEM pump in the ASHP atm, and flow and return just tee off to UFH and rads? Day job for a decent plumber, one who doesn’t spend longer talking about how it ‘can’t be done’ than the job would actually take to do. This is a low temp pump and mixer set, one I’ve been fitting for nearly a decade. 1” BSP connections to match your manifold. Link This isn’t a typical, much cheaper, TMV, but instead a thermo couple type actuator which responds by temp / hydraulic in a far smoother and more refined way. These don’t whine or chatter at their lowest settings like a regular TMV’s often do, so with this type of unit you’ll get very accurate, low temp control for the UFH in the slab. Needs a bit of “tight space plumbing” skills, and prob to pack the manifold off the wall very slightly, but defo can be done in the room available. Done these in much tighter spaces tbf!

I’m not in radio 4 territory yet sorry.

That would delete all the decorative beams?

Just pics and words unfortunately. Can you take a pic of the instruction manual and post it here? Just take the pic and save it to your photos. Then click add files below the text editor here and it’ll ask you to choose photo.

PIR lights will usually have a connector block with 4 terminals. 1) earth (usually just somewhere to park the earth that you have at the end of your cable, and not always needed if “double insulated”) 2) N neutral 3) L permanent live 4) SW L switched live Some will have the L disappear into the fitting and feed the sensor, and then the sensor sends the SW L output back to 4. The factory wiring then has the live to the lamp in there too. Some are set up so you don’t see the 4 terminals, as the factory working is contained within the unit, a-la most modern led floodlights, so you only get to give it L, N and E. Do you have a link to the exact fitting you bought?

You may need a differential bypass valve, across flow and return before the valve. Are you 100% sure that the flow and return are the correct way around, as the thump is often associated with the valve 'paddle' being slammed shut in the flow.

A switched live is only a switched live, if you keep flipping the switch. If you flip the switch on, and leave it on, it's then a permanent supply Live is live, comes from the same place, ends up in the same place.

Sounds nonsense. If this is a PIR light then you’d just turn the light switch on and leave the unit powered 24/7. Then you have L & N + E constant power. If you want to turn the switch off, for some reason, then seems an odd choice of light fitting! Switching it back on will provoke a start up time event, every time you do so, but then it’ll go off and into PIR mode. Just turn the light switch on and leave it on. I assume you know you shouldn’t be connecting L and SW L together? Nothing but the factory wiring should be in SW L.

What m2 of area do you have the ‘dip’?

The exact same one I fitted in Leicester. IIRC I used a threaded fitting from hep2o, and PTFE taped it onto the threads of the Frosti. I had to use that to lengthen the tap though. Are you going to need to have an angled fitting immediately on the end of the tap to connect it flush to the wall?

Aurora are very good imho.

I stayed in The Falmouth Hotel a good few years back, and the shower curtain over the bath, in the multi coloured suite, looked like Zoro had been using it for target practice. Stayed in a Greene King hotel (?) in Halstead, and as someone had run out of loo roll, and the shower curtain was right there……. Yup. Staff member apologised to my mate, and he said she took that one and swapped it into another occupied room, giving him their curtain…….saying they had no spares and no facilities on site to clean it. 💩🤢

There’s no issue of trust here?! He just fitted the spots he thought were correct at the time I guess? Just open the circular junction box and remove the offending article. Are these units in the pic fixed modules or can you replace the lamp?