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You could raise your 3x2 and put 100mm insulation onto the concrete so to fill in the void under the shed.

The semi bit is that its semi pumped.

Our system has been in since 89 the return to the boiler is pumped there's no valves at all its a bummer when the bubble bursts when your in the bath.

Are you saying i am making this up Dan !! the semi gravity system was used from the 1960,s to the 90,s the boiler heats up the hot water cylinder by natural convection it has one hallway stat no MV,s if you check out the honeywell site you will see the original layout i,m not talking schit...

If you google semi gravity it must be an old way of doing things

HaHa it is a real system mate honest. apparently ours was fitted in 1998 it,s a primatic cylinder with a bubble and its classed as a semi gravity the boiler is a kingfisher MF 100 with a gravity flow and return and a pumped return i when,t on the boiler man site and found out what it was.

Just bought the latest heatbank from gledhill i have at the moment a semi gravity primatic cylinder is it just a straight swap

I think it all depends on what your happy with in the finished result, some people are happy and satisfied with what they have done, i on the other hand are a nightmare i trained as an engineer when i left school which is a problem when it comes to doing anything even making a butty the bread...

Its called the capillary action because when you stop the cold water flowing it drags the remainder out like a syphon.

We will all be on commission lol.

What about some sort of piano hinge ?

You dont need to be qualified to fit an open vented cylinder you need to be G3 certified to install an unvented, if you are changing the cold water tank, which i would it must comply with bylaw 30 for the storage of cold water which should be stamped on it, also when you replace the cylinder...

When the fireplace was built it took its own weight and was fine its only been bricked up to fill it in.

If it says quarter turn they have ceramic valves inside which has a small opening if you were to get single taps or mixer with rubber washers you would get a better flow, obviously that depends on the height of the water water feed tank.

All depends on the size of the inside size of the tap wether it is mixer or single what hot water supply have you cylinder or combi, and size of pipes to tap ours is 22mm hot because its copper cylinder and 15mm cold as its mains.

All depends on how much you open the taps as to how they mix we have a victorian mixer on our bath hot is open vented and cold is mains pressure and it works fine.

Prob finding some new customers who need work doing.:rolleyes:

The arched bricks was a method used for hundreds of years its really strong if you want google fred dibnah he will show you and explain why its so strong they is the center brick and its based on physics downward and outward pressure, does look good though, we live in a 1905 terraced house in...

I love the stone work in the alcoves are you leaving them exposed.

Looks like you still have the original opening you can see where it has been filled in will be fine to remove the added bricks,stone.