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Ive got a retro fitted Megaflow, running on a Worcester Bosch Greenstar RI gas boiler. When the Megaflow was install it appears they kept the Y Plan heating system in place, however, they have not added in a thermal cut out valve on the primary flow to the coil. My question is, once a...

So in essence, he should: * Knock out holes for acro's/strongboys * Insert strongboys * Knock down the portion of the wall to include leaving recesses for the padstones * Insert the beam in place * Acro it up into position so it is supporting the course of bricks above it. * Lay the...

Hi All, Just a quick one for the more knowledgeable. Before I start I should like to point out that I am not doing the work myself, just being nosey and wanting to have an understanding before the builder takes over. I have had a look for an "order of process" on here but couldn't find one...

If you do that you will be breaching manufacturers instructions and liable to damage the pump as you will prevent expansion. It is OK to fit NRV's to the outlet side of the pump - but not the inlet. Please be careful about the advice you give on here as that directly contradicts express...

I had something similar last week, got called out to a customers house who was complaining of no hot water. Unlikely to be an air lock as no work had been undertaken on that system recently and no history of airlocks.. decided it must be a blockage, and hoped it would be between the CWSC and the...

and watch out for any pipework already buried in the floor!! :)

This is how most of the units seem to come - you will need to adjust them to fit. the plinth is designed to be recessed otherwise it would look strange. I know it leaves a little gap but you can always infill this with a little offcut of the plinth. The "shelf" more often than not needs to be...

I think it is rising pressure - OP says it "goes down into the red". I think he means the needle moves through the green to the red section - i.e. pressure rising.

Re. the above - I've used them before - pretty good service... pin pointed the leak in the screen within about 10 minutes, we dug down - sure enough there it was and then fixed the problem. Their thermal cameras detect the heat so they can check all of your floors pretty quickly. Only downside...

You will need to use 3m lengths of hep or JG barrier pipe with a 3/4 inch tap connector at the end.

Yes it gives me an idea: It gives me two trains of thought - a) install a normal shower valve connected up to feeds from the combi. This is what I hope the OP means and makes sense. b) he is going to install a tank fed power shower onto a combi run system. I hope he isnt going to do...

When you say "power shower" what exactly do you mean? Do you mean an electric unit that you put on the wall above the bath? or do you mean a separate shower valve - usually chrome in colour. Yes i know I am putting this in laymans terms - but I can't bear to watch if OP is going to plumb in a...

:lol: Knew i shouldn't post at 11pm!....

About a year ago I went to quote for a commercial job on a retirement home - about 40 unventeds all down in the basement... id say 90% of them were rusted almost through. Never got out of somewhere so quick in all my life! They had an "onsite maintenance man" who had been doing al the work to...

Thats what I was worried about. Main issue is the cylinder stat isnt working - but as i said, just an after thought that I couldn't spot a high limit stat anywhere obvious made me query a) where it was and b) why it hadn't cut out the boiler primary's before the TRV operated. Will have a...

With all due respect I do have an unvented card I was just asking a simple question as I didnt have the MI's and before going to have a proper look tomorrow and wondered whether anyone had experience with this model. I don't tend to work on or install the OSO's. I called in on my way home...

Thanks all... @picasso many thanks - i didn't have these to hand as customer has lost them. Makes total sense they'd be as one as I couldn't work out why both of them had failed!... if its the same unit then that explains it. MV is working as expected but Stat isnt shutting the MV off...

Hi guys - went to customer today, pushing out boiling water through Temp relief valve, looks like cylinder stat isn't working as motorised valves both seem fine. However, upon looking at the cylinder there didn't appear to be a high limit stat fitted anywhere - or any other means of...

Just PTFE on where the tails go into the rad is all i use

Cheers guys, much appreciated