Internal plumbing being redone - what size?

[ey143]

Edited comment.
Had one plumber at a show tell me most house these days are 28mm when doing new installs. Is he talking ****?

 

[dilalio]

Who's doing it? You as DIY or a plumber you are employing?
If a plumber/heating installer is involved, with you doing some of the work, then consult with him as everyone has their preferred designs and methods. The installation specifics and unique site conditions also factor in, so it's impossible to give a 'cover all' response to your question!

 

[ey143]

comment removed.

 

[dilalio]

You have let doubt enter your mind, which is entirely human.
I would raise your concerns with your plumber and be honest about their origin. You (and your plumber) need to start with the supply and demand requirements of the chosen fittings, outlets, radiators etc and work backwards from each location, to determine the first fix infrastructure. They are your parameter settings for which you would overcompensate slightly.
Have you chosen all your fixtures and fittings?

 

[Agile]

Have you agreed with him just how many showers/baths you will be able to run at the same time?

Tony

 

[Steelmasons]

In the middle of installing the plumbing/heating for house with 7 bathrooms......42mm hot and colds.........

 

[dilalio]

5 bathrooms = 5 baths?
That's a lot of demand if all being run at the same time!!! Or any combination of baths/showers/basins/wc's/bidets/etc etc all calling for hot and cold water.... And how far is the run to each from the boiler(s)/cylinder(s) etc - And what system are you having to satisfy the demand for CH and HW?
There are SO MANY variables and it's ALL relevant!
You have only provided the minimum of detail!

 

[Steelmasons]

1000 litre storage cylinder coupled with a 60kw boiler.....or as Agile might suggest an allowance of 2kw for hot water requirements..

 

[dilalio]

1000 litre storage cylinder coupled with a 60kw boiler.....or as Agile might suggest an allowance of 2kw for hot water requirements..

Sorry Gwiz! My last post was aimed at the OP!

 

[ey143]

comment removed.

 

[AGAS]

But to be honest at the moment not all of them will be used at the same time as we are a small family and to be fair not all baths would be run at the same time

got to design it so that it can be used all at once , because there can be a time when all are used at the same time which means its designed properly.

 

[polesapart]

got to design it so that it can be used all at once , because there can be a time when all are used at the same time which means its designed properly.

But pragmatic to factor in some diversity; its a home for "small family" not a high-end hotel or cat house.

Wonder what size the incoming main is.

 

[dilalio]

got to design it so that it can be used all at once , because there can be a time when all are used at the same time which means its designed properly.

But pragmatic to factor in some diversity; its a home for "small family" not a high-end hotel or cat house.

Wonder what size the incoming main is.

So many variables..........

 

[Agile]

It was an advertising post from someone who did not seem to realise this was a UK based site.

Since taken down by the site operator.

 

[ey143]

got to design it so that it can be used all at once , because there can be a time when all are used at the same time which means its designed properly.

But pragmatic to factor in some diversity; its a home for "small family" not a high-end hotel or cat house.

Wonder what size the incoming main is.

25mm blue pipe.