Outside tap instalation

[plumben]

Have to admit this has always puzzled me, could you explain why if I ask nicely.

That's how its shown in the water regs book,
But what if the tap is changed in the future
The in tap dcv can be damaged by frost
Also those taps are made to be fitted when a outside tap is replaced that has no dcv inside

 

[Eric withy]

most importantly drain down ye caravan water pipes hot and cold down when the season ends or lots of burst pipes when you come back the following year or employ someone who knows how to as can save ye a fortune