Head?

[plumbandplumber]

No, not that sort. :nono: Looking around on the internet, head seems to be measured either from the surface of the water in the cold tank down to draw off point, or from the bottom of the cold tank.

Which one is correct?

 

[Masood]

Surface is what I've been taught but I suppose the bottom of the CWSC gives you the worst-case scenario..

 

[JCSPLUMBING]

Surface of the water. 100%

 

[PlumbBobBob]

yes surface for me too

 

[Rickster123]

Portsmouth for me

 

[Rickster123]

Oops sorry didn't read the question properly..

 

[townfanjon]

Surface, its the one people forget, its atmospheric pressure .

 

[Ray Stafford]

I was always taught to measure head from the tank connector, not the water surface.

 

[Ray Stafford]

Surface, its the one people forget, its atmospheric pressure .

What has atmospheric pressure got to do with it TFJ?

 

[ShaunCorbs]

What has atmospheric pressure got to do with it TFJ?

pushing down on the water in the tank