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How does the pump tee off the hot side of the cylinder

Supplies to pump, restricted, too small or not tee in correctly

Poly york pipe, 1970s, made by IMI YORKSHIRE, now PEDLER YORKSHIRE

Im sure the 50 are open flued . The B on 30b and 60b are balanced flued

Those pumps have wire gauzes on the flexible pipe connectors, check there no sediment or loose scale restricting the flow first

I prefer to use hep20. I find best to get a bundle of straight lenghts.

Its a giacomini atlas head

Continuous running water is a common fault with the modern push button toilet cistern. Scale or torn washer on the push button flush syphon. isolate the water supply and repair or clean the syphon. Normally, a sharp twist anticlockwise on the push button syphon will release it. Turn the...

You need a vent on the main soil pipe, having the smaller waste pipe tee into each may not be good. They are best to connect to the main soil pipe separately.

Check shower filters

Bath shower mixer tap usually thermostatic. Usually have the same inlet distances

Acid based chemicals are bad on rubber seals and also aluminium heat exchangers.Kamco do a acid free cleaner hyper-flush, or fernox f3 is popular

I have checked and what you have drawn up is acceptable, you just require an AECV label next to the meter

You cant do that. The anaconda and ecv should be with the meter. The anaconda cant pass through a wall, you should be able to inspect the whole length.

The heads on those valve should pull off easy and change with a new one. Check the pin moves freely on the valve body, if it doesnt then that may be the problem. The override button only works if the receiver and thermostat have lost connection. You would see a solid red light on the receiver...

Sometimes with new supplies you get grit come through which collect in filters/strainers on the softener. Also alot of modern taps have filters on the ends. Try checking there clear

I had symptoms like these when i moved to my new house, turned out to be spores from mould growing on wallpaper through damp.

With a combi, it prioritises tap water to heating. If your can fit it in I would recommend the worcester 440cdi highflow. Delivers 20litres per min. And easily supply 16 radiators. Expensive tho .

From what I've heard, boilers with aluminium on heat exchanger and flue path can react and corrode slightly to condensate water. I'm sure the 80 and 105 have aluminium inner flue, same as there heat only solo and promax boilers. There latest combi all use plastic inner flue which should keep...

The condensate water normally go's milky. More likely overheat stat faulty or PCB board faulty which do go wrong commonly.