bypass valve do i need one ?

[darz456]

Hi guys i have another question for you

I have what apears to be some type of bypass valve fitted staight after my pump that feeds back to the return to the boiler . It has a knob on the end and can be adjusted .
please can you tell me what this does and what ideal position it should be in or if it even needs to be there i have heard it could be using up more gas by having it

Cheers

Darren

 

[D_Hailsham]

Which boiler do you have (make and exact model)?

How many motorized valves do you have?

Make and model of pump - if not inside the boiler?

A bypass valve is provided to ensure that the flow through the boiler meets the minimum specified by the boiler manufacturer.