10mm OK to feed a shower?

[rarara]

Bathroom renovation, and I can run the hot and cold feed for the new thermostatic shower mixer from one of two places: 1) existing bath which has 15mm polypipe coming through the floor, or 2) the sink which has 10mm copper coming through the floor.

the sink 10mm is in a better position to take a feed from for the shower - would it make much of difference to use this rather than the 15mm? water pressure etc is fine.

 

[Diyisfun]

15mm or you will be wishing you had.

 

[leakydave]

Pressure is one thing but flow rate is another. Do it all in 15mm. What does the shower installation manual say???

 

[Madrab]

Yup...15mm - 10mm won't flow enough.

 

[longdogs]

+1

 

[JacktheFitter]

10mm to your basin? must take a week to wash your face.

 

[Dan Robinson]

My kitchen and utility are supplied with 10mm pipe.

Flow is fine, reduced volume means quicker delivery of hot water and led wasted discharge.


Wouldn't want to run my shower off it though.

 

[JacktheFitter]

Flow is fine, reduced volume means quicker delivery of hot water and led wasted discharge.

Pressure does not differ,circumference/ length of pipe run affects both flow, delivery and temperature.

Wouldn't want to run my shower off it though.

Contradiction.

 

[Madrab]

Yeah seen 10mm many times in newer builds to feed basins and sinks that have water saver aerators in them, seem to work ok.

Wouldn't have the flow to be able to shower more than 1 body part at one time tho, that's for sure

 

[matt1e]

Flow is fine, reduced volume means quicker delivery of hot water and led wasted discharge.

Pressure does not differ,circumference/ length of pipe run affects both flow, delivery and temperature.

Wouldn't want to run my shower off it though.

Contradiction.

how is it a contradiction?makes sense to me, there's two different requirements thats all

Matt

 

[JacktheFitter]

My kitchen and utility are supplied with 10mm pipe.

And :

Flow is fine,
Wouldn't want to run my shower off it though

For the record nobody but cowboys,diyer`s would ever dream of piping up any supply in less than 15mm pipe and never in plastic or pushfit fittings.

 

[Dan Robinson]

So you think a shower and a basin/sink will require the same flow rate?

This forum certainly attracts some prize spanners

 

[Biggles..]

My kitchen and utility are supplied with 10mm pipe.

And :

Flow is fine,
Wouldn't want to run my shower off it though

For the record nobody but cowboys,diyer`s would ever dream of piping up any supply in less than 15mm pipe and never in plastic or pushfit fittings.

Only a muppet would come out with such drivel!

 

[picasso]

Most shower hoses are about 8mm and seem to be acceptable so running hot and cold in 10mm as long as the runs arent too long would not be noticable, not saying I would do it but it would not be the end of the world if the op done it.

 

[leakydave]

As I said earlier in this post... refer to MI and follow them.