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Honeywell have answered Q3 and the answer is no, or rather "The evohome system will work exactly the same like 3 individual thermostats. The TPI is calculated for each zone individually." Might be still useful, can anyone answer the other 2 questions please? Thanks

I'm looking into smart heating and have a few Evohome questions for people in the know. I haven't decided yet whether to go for it. My system has 3 heating zones and an unvented cylinder, each zone has a V4043 zone valve, with a Glow Worm system boiler. I don't want to use smart radiator...

BES call it "bayonet cooker hose socket blanking plug" in their catalogue.

Great, exactly what I was looking for. I see BES have them but are they easy to get at a local plumber's merchants? Thanks for the tip about the silicone grease.

Gas Bayonet by mogget posted 24 Oct 2019 at 8:02 PM I am switching to an electric cooker, as a result I have disconnected the gas bayonet and it will be unused (but I don't want to get rid of it). Are these OK to leave as is, or should it be capped / have some sort of blank put in...

Thanks everyone for the information, that seems to settle it!

That's interesting. I don't know who my DNO is but I'm in the old Southern Electric area. Is the cross-bonding at the boiler still mandated by the current electrical regulations?

I currently have a bond to the MET on my gas pipe, as per gas regs. There is no bonding on the rising main, which comes in in MDPE before switching to copper at the stop valve. The pipes at the boiler are cross-bonded. I have a TT installation with an earth rod, a Wylex NS consumer unit, and a...

I don't know that particular bog, but is it the doughnut that seals between the cistern and the pan?

This may have been covered, but I assume the OP is using flux?

Try setting bypass to 3 and pump to max, see if it improves things, the setting can be refined later.

Yes but speak from experience.

The lockshield valves will restrict the flow equally well on the flow or return. What you might find though is that if the lockshield is fitted on the flow, expanding (micro)bubbles of air can cause system noise. It won't affect balancing but lockshields are better on the return, for noise...

I've never had any problem with acetoxy and stone resin trays, but it hadn't occurred to me that there might be. 785 is about the best silicone sealant I've ever used.

When trying to understand wiring, think of it as both power and signal, and look at the wiring diagram "as the electricity sees it". If you know which switches are open and closed you can trace it through. Same with water diagrams and valves. Rinse and repeat for different starting conditions...

Just a hunch, is this a thermal store system?

Report your own post and ask a mod to move it?

In my experience the plate heat exchanger always blocks up first when there are sludge problems. This is because the passages are the tiniest in the whole system. OP, is the heat exchanger blocking up on the boiler side or the mains water side?

It's very unlikely, probably it will just keep dripping till it's fixed. If the shower's above a bath leave the plug out and any leakage will flow down the drain. edited for spelling