22mm or 15mm to baths on uvented system

[Mgrant]

For a house supplied by an unvented hot water cylinder is 15mm or 22mm usualy taken to the bath taps. I know on a combi its only 15mm require as the cold supplying the combi is only 15mm.

 

[nysk2008]

i believe 15mm is fine but 22mm is recommended

 

[sheff paul]

For a house supplied by an unvented hot water cylinder is 15mm or 22mm usualy taken to the bath taps. I know on a combi its only 15mm require as the cold supplying the combi is only 15mm.

I take 15mm to bath taps, split from a balanced 22 mm feed from the cylinder cupboard

 

[sheff paul]

i believe 15mm is fine but 22mm is recommended

most cylinder manufactuers specify 15 mm take off for each appliance,this gives less water in the drawoff so faster time for hw delivery

 

[AWheating]

15mm to bath, 10mm to basins

 

[Mgrant]

10mm to basins why?

 

[Mike Jackson]

10mm to basins why?

Less water wasted as less to cool in pipe plus quicker to get to heat. 10mm flows plenty for a basin tap.

 

[Mgrant]

So do most people just recommend 15mm to bath taps then on an unvented system?

 

[SimonG]

Yep..

 

[Mickyplumb]

As everyone says, 15mm as it leaves less of a dead leg to exhaust before the hot runs through

 

[Mgrant]

So would people feed a full bathroom room shower, toliet, basin, bath off 15mm?

 

[SimonG]

I would want the shower supplies as close to cylinder as possible. Not that it would really matter.

 

[AWheating]

So would people feed a full bathroom room shower, toliet, basin, bath off 15mm?

you could run 22mm and branch off in 15mm, but then you could ask why somebodys having a poo while im in the shower.

 

[Mgrant]

Branch off to each appliance in 15mm from a 22mm main run?

 

[Chris F]

I have always gone 15mm to bath and basin.