Two 'draining' taps outside - why two?

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I believe I just drained my central heating system by use of the outside LEFT tap.

What does the right one do? I briefly turned it on and the water came out with more force.
 
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No, these are definitely draining taps.

20210801_164553.jpg



I have a garden tap around the side of the house.
 
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Stab in the dark but because you said with more force could it be to drain a cold water tank?
 
jesushchrist i hope its diyers replying here and not pro`s 2 draincocks one on flow one on return , pretty standard
 
It's no big deal just drain them both. Two is better than one or so they say. Always check if the washers need replacing. And fill that gap around the pipes.
 
jesushchrist i hope its diyers replying here and not pro`s 2 draincocks one on flow one on return , pretty standard
could you elaborate a little further

Our property has two, and when I moved some radiators a few years ago I drained both - but didn't really know what I was draining - LOL
 
jesushchrist i hope its diyers replying here and not pro`s 2 draincocks one on flow one on return , pretty standard

That is a rather sweeping statement, with a large possibility of being simply wrong. The OP needs to trace what the the drains are designed to drain, rather than guess - maybe label them for the next time.
 
That is a rather sweeping statement, with a large possibility of being simply wrong. The OP needs to trace what the the drains are designed to drain, rather than guess - maybe label them for the next time.
Sweeping statement my ass its basic central heating installation practise
 

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