Can anyone tell me what this is?

Can anyone tell me what this is, and what it should be set too?

Moved into a new house and noticed this connected to the Hot Water tank. It's on the floor and I presume its some sort of Pressure valve/throttle, but any idea what it should be set too?

 

Auto bypass, which the installer would have/should have set

 

Thanks very much. Only reason I ask is that the previous owner has played around with pretty much everything, and we have a rather temperamental GROHE shower, which seems to keep tripping it's safety cut off. I wondered if this could be anything to do with it?

 

No, that's a by pass for your heating

 

Ok. Is there a general rule of thumb for where it should be set? Or am I going to have to get an engineer in to set it? I was hoping I might get away without having someone in?

I have a feeling that the shower head is causing a back pressure to the shower and that's why it keeps cutting off....

 

If the heating radiators are ok and hot, leave the auto bypass alone.

Daniel.

 

Ok thanks

 

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