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That's 2 different functions. The system water (CH) control on the boiler will still control the actual system water temp out to the rads. The new stat will keep the demand for heating going (boiler running the CH) until the room with the stat in it reaches the set temp and then it'll shut the...

No reason why not. Just keep the loops sealed so there's no ingress of anything until they are needed and then connect up, flush and commission.

I think everyone needs more fibre in their diet :unsure: :LOL:

If it's a concealed LL cistern then fit a Thomas Dudley and throw away the 6L box ;)

+1 - the standard for a combined feed and vent would be 22mm all the way. Also, they aren't really a standard as they can be a bugger to fill and can be prone to airlocks if not done slowly, although, as suggested though if it's worked ok up till now. Combined feed and vents were usually used...

Oh dear - as suggested - if you have set it up so it uses a fixing kit, then it needs to be bang on 150mm and if there's absolutely no play in the pipes, then unfortunately you'll need to get in there. Could only be used if the op had used wall plate connectors or 1/2"x15mm female compression...

There shouldn't be any difference TBH - all 110mm PVC-u pipe would normally be able to fit either push fit or solvent weld couplings - 110mm is 110mm OD regardless of the connection type, if you see what I mean. As I say though, for some odd reason some makers don't seem to want to stick to the...

Most soil pipe these days is PVC-U, even the single (ring) socket ended pipe and as long as it is PVC-U then it can be glued. Most cements will also solvent weld ABS and PVC

The reason I ask is the TS have a make of plastic called Aquaflow and it seems to be a different size to the other manufacturers. Every other maker is just about interchangeable - as they should be given the nominal BS sizes of the pipe and fittings should be just about the same same. Real...

Cut it further back where it may be out of sight then use a compression fitting to remake once soldered.

Threads with PTFE tape don't need to go fully into the stop to be watertight but you do want it relatively tight otherwise all it will do is loosen when a hose is attached to it and it's pulled around. Buy a roll of GAS PTFE tape, it's thicker - 7 wraps will do

Can I ask - Is the other one possibly from one of the other sheds like TS?

Replace the lot, doesn't owe you anything as I'm sure it's been in there for a long time. The waste was probably overtightened to start with and now the seal has age hardened and it now needs even more pressure to seal it back up and that's resulted in the grate bending.

Yes, It would, pushfit fittings normally have a line as to how far the pipe will insert into it as well as the pipe will be marked. Alternatively the body will change diameter so it'll pretty apparent how far the pipe will insert into the fitting.

If it isn't squeaky clean then yes, even then they can still be a bit of a bugger sometimes. As suggested bunging the system and half fill the new rads from one side then the other to avoid pushing any extra air into the pipework. Or if you can freeze it then even better but you'll need to...

As you suggest, the shower pump is controlled by the flow switches, they sense flow in the pipe and that flow in the pipe is controlled by the valve(s) in the shower. By that reckoning, descaling the shower head wouldn't alter the way the shower valve and reed switch system works, therefore it...

No chipboard anywhere in a bathroom IMO. Worst decision ever to put a material that literally falls apart when it gets damp/wet into a space that gets damp and wet. Replace the chipboard with OSB3 or ply, min 18mm thick. If it's upstairs then tank the wet space before tiling and laying the...

Oh dear, well the first issue is the flexi pipes that are already there. Ideally they would be replaced. The run rigid pipe out from the plastic in the wall and clip it properly if you are looking to add an appliance tee. You really want to secure/support the cold feed that the tee will be on as...

I always use copper up through the floor into the valve. Much more sturdy and better against any mechanical bangs from vacuum cleaners etc.

Not good enough - if building control say it hasn't been notified then quite simply it hasn't been and the builders need to get it sorted, or all you can do is threaten to get it done yourself and then bill them for it.