22mm or 15mm to hot bath tap?

[hvendlor]

I have a combi boiler, therefore does it matter whether I use 15 or 22mm pipe up to the hot bath tap?

would be a lot easier to run 15mm hence my question

 

[swbjackson]

Use 15, less water wastage waiting for the hot water to get to the tap.

 

[Eng33]

....age old debate.

What water wastage?! Don't know about you, but I don't fill my bath with ONLY hot water, therefore why is water wastage an issue? Just put the plug in, and open the hot tap, doesn't matter if some scold comes out first does it?

 

[gas4you]

Combi's need 15mm pipe on the hot taps to work most efficiently

 

[Master of None]

....age old debate.

What water wastage?! Don't know about you, but I don't fill my bath with ONLY hot water, therefore why is water wastage an issue? Just put the plug in, and open the hot tap, doesn't matter if some scold comes out first does it?

The wastage is the hot water left in the pipe to go cold.

 

[blondini]

There's nothing to debate. The answer is to use 15mm as 22mm has no advantage for the OP, only disadvantage.