MDPE 32 or 25mm into the house

[Dotty]

"Thames Water upgrade my mains connection to a 32mm MDPE," so i read that as 32mm to a meter or the stop tap?

Perhaps OP will confirm if 25mm went straight into push fit connection at meter or if TW left 1 metre of 32 mm for external connection.
In my area the water company would be screaming, "Infrastructure Charge", for a straight 32mm run through.

Yep I agree with you that a standard metre installation is 25mm MDPE but you can have 32mm MDPE if your property design requires a larger flow rate, it might not be easy but it is achievable.

Maybe the OP can clarify for us?

I have just had Thames Water upgrade my mains connection to a 32mm MDPE, however my builder has run a 25mm MDPE after TW stopcock from the property boundary into the house,

Says it all, boys

 

[seb963]

I have attached a picture of the connection just after Thames Water stopcock. At the top is the MDPE pipe coming from the TW stopcock, at the bottom is the 25mm running into the house that the plumber fitted.
Looks like the pipe coming out from the stopcock is a 32mm?

 

[Dotty]

Is he really planning to bury that demountable fitting?

 

[joni os]

I stand corrected that is 32mm stepped down to 25mm and the builder must have realised when he purchased the fitting. Your £1100 cost misled me. Last time I wanted larger connection for nursing home, supplier wanted £5500 infrastructure charge and we ended up increasing cold water storage.

 

[seb963]

So does this mean the builder was correct to downsize to 25mm, or could he have carried on with 32mm inside the house to the internal stopcock?

 

[Riley]

I think the answer without seeing is that 25mm should do what you require however they could've carried on in 32mm

 

[joni os]

So does this mean the builder was correct to downsize to 25mm, or could he have carried on with 32mm inside the house to the internal stopcock?

He should have asked the question and you should have asked a plumber. Hopefully the internal stopcock is to 22mm copper as is your cold water feed to unvented. A G3 plumber should sort out cold water balance to shower and bathroom fittings together with necessary non return valves. The benefit of replacing 25mm with 32mm can then be assessed.