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Yes! Sorry, I misinterpreted your post.

Your Reno is just a Gianonni heat exchanger, just like Vaillant, Baxi, Glowworm, Broag, etc Bernardgreen. Hardly the choice of someone who thinks alternatively? Worcester have the best customer service, bar none. Many of the regulars on this forum like the Intergas. By the sound of your...

The expansion relief into the Worcester plastic drum is perfectly acceptable and is per the manufacturer installation instructions at the time. The problem is likely to be the expansion vessel, as described above. These have a very hard time in a solar thermal location because of high temps...

I posted this on Page 1. We've come a long way.

With an oil boiler it is not considered such an issue on small domestic, for starters the oil boiler has a high water content. Grant do make an optional pressure monitoring kit, we've just fitted one to a new external Vortex we've just installed. If the boiler is the lowest point in the...

Pump is the problem, or an airlock. 80/20 odds.

Acidic flux in a s/s cylinder can cause premature corrosion. Can you see it leaking from a weld or is that conjecture/supposition? I would say it was not fit for purpose; however your claim is against the person you paid for the cylinder, which might be your boiler technician. If he has a...

The number of loops is largely immaterial to the boiler. The 'TRV' on the manifold can shut off the flow when the manifold gets up to temp, whatever the number of loops. I'm sure an external bypass would help, but the facts remain that; -the system boiler has an internal bypass -it has...

What Homeserve want is your £10K plus 12% and they own all your customers. They are already doing the marketing and own the contracts for maintenance so I'm sure they have plenty of leads.....it's just that 12% is a lot of your margin. You would have to charge 12% more than you do now, which...

I don't think there would be any benefit in flushing the UFH. Are you saying all the system, everything, was new 5yrs ago?

The tall one might be for a toilet extract, from a photo it is difficult to see, the flashing used is similar to a balanced flue boiler. Nevertheless, the separation distances to what is now an air vent, from the flue, do not appear to be 600mm from the picture.

Well there appears to be a few problems here. First of all there doesn't seem to be the correct separation distance from what looks like a balanced flue terminal adjacent. And secondly, as the BG man says, the open flue Bermuda terminal does not seem to be high enough in relation to the roof...

The bypass fitted to the Minute is, according to the manufacturer, fit for purpose. Also, as it worked OK before, something has changed. Boiler might have a partial airlock in it, or sludge could have blocked the internal bypass. One of the other RGis on here is a Vokera specialist, so lets...

One of the more honest usernames on here.

So, Ted, that means you must know more than all of us to make that judgement? You must have a lot of experience.

Archimedes principle. Water, or fat people.

We've had mixed results but most of our domestic installs date back a couple of years or more. I liked the WB1B open vent a lot but we had problems with some 200 series, they were the 4 pipe systems too. The Lambda sensor was causing high Co on a couple. Havent tried the floor standing 2...

Have you fitted many Viessmanns, AJR?

Regarding the size of the boiler for heating, if you can use this online ready reckoner you will be streets ahead of most of the people you have seen; http://www.idhee.org.uk/calculator.html Be aware that how many rads you have and what size they are is pretty immaterial; it is the size of...

It'll almost certainly be a pin hole in the mastic around the economiser cleaning panel; try squirting LDF over it.