Bypass

[helpsy]

I thought on a bypass above the pump you needed a pressure relief valve.
Why do so many places have a gate valve.
Just wondering.

 

[Puddle]

Old habits die hard,in the old days before pump pressure opening valves,it was common practice to use a gate valve to balance down the by- pass ,then came cost,but now the pressure opening valves are quite cheap,give it another few years and we will all be screaming at any one who uses a gate valve

 

[helpsy]

So if a gate valve was used is it set to partially open?Say midway?

 

[Puddle]

Well in therory it should be closed just enough to allow the pump to circulate around the heating system with all radiators in the open position

 

[oap67]

I remember spending many happy hours getting these valves just right.

 

[stevetheplumber]

I remember spending many happy hours getting these valves just right.

start with it shut and open till you hear the flow go through thats enough