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one arrow is not bi directional

it's ok providing they are bi directional trvs. look for arow markings on the chrome part of the trv

thats their loss at the end of the day. every customer you let down thats a dozen new contacts they have lost. you know what they say yrs to build customers 5 mins to loose. :wink: if they don't turn up they are wasters, get someone else.

measure how high you float valve is from top to bottom. you may fit a 91/2 then find you can't get the lid on.

how longs it been like this ? since install or after ?

where is the cold feed from ?

surrey flange is the proper way to run a shower feed. not from another supply.

fit a surrey flange.

no one said 12 l/m at 40c, it 12 l/m at 5c 3.5 l/m at 35c

how about trying again yes 12 litres per min a pump can draw from mains before you need approval. an average 9.5kw electric shower will give 3.4 l/m at 35 degrees, 12l/m at 5 degrees. so it is illegal for what he wants. if you want to be funny.

it's illegal to pump mains water. like you say it sounds like you are supplyed by tank and kitchen by mains. if you have a combi boiler you can fit a mixer supplied of that and have balanced hot/cold pressure. get your incoming mains pressure checked for pressure. is your kitchen sink tap...

all you do is fit air bleed valves in the highest pipework.

you can't fit a pump to the mains cold water.

can re-use nut and olive providing it's not been over tightened or the olive crushed many a times you change parts and re-use the olive and nut.

try sticking it on 3 for 10 mins should get the air out. or shut the system down and remove the centre nut and see if any air releases. or poss could be bearing in pump starting to go.

will be ok on 1 for now. is it not making a noise when the hw is on heating off ? usallyif the pump is on it's last legs or air in the pump it will be noisey on hw and heating.

i would go for the brick wall. :wink:

it's hard to tell unless you have a full pic of bath.

your building control will tell you how he wants it.

i take it you can nick a hot/cold feed from them lot behind the plasterboard.