DIY Doctor UK DIY Forums

Hi Guys,

When fitting an outside tap (HOT), I'm assuming you still need to fit a double check valve? - question is, will there be adequate pressure to open the valve?
I'm guessing this wouldn't be a problem for a pumped combi system? but what about a gravity fed system?

thanks in advance...

Hot top potable water will not be contaminated.

thanks for reply....

so it's not possible to get the 'syphon effect' on a hot tap? - just trying to understand the difference...