In article .com,
wrote:

Stan The Man napsal:
In article . com,
wrote:


Is there somebody with timer and pressure 0,1 bar? Which type
do you use?

No - you have zero chance of getting a timer to work at that pressure.

Chmm. Now I find
Claber Aquauno Video-6 Plus
http://www.easywatering.co.uk/acatal...er_video6.html
with info "...With an operating pressure range of 0,1 to 12 bar..."

Why I have zero chance?

Because that product uses a solenoid valve which will only work with
very clean water. For use in a water butt, you will need a timer with a
gear driven ball valve which won't self-destruct on the impurities in
the water. The disadvantage with the latter is that its minimum
pressure requirement is officially 0.5 bar. It's possible to get them
to work with a butt which has been raised on high to increase the
pressure but the likelihood is that there would be some leakage at
below 0.5 bar since the valve won't shut off completely.

Someone in this thread has reported good results with a Hozelock (gear
driven ball valve) timer used with a raised water butt; if you feel
lucky too, you could give it a go but watch out for small leaks when
the valve doesn't fully close.