Constantly fluctuating pressure gauges!

[RodWood]

Hi there,

We have a pressure gauge attached close to an underfloor heating manifold. When the normal radiator heating is on (UFH on or off, makes no difference) it rattles like crazy fluctuating in pressure.

An engineer replaced the valve but it made no difference.

Is there a common reason this could happen, does it indicate another problem or is there a better valve you can recommend which doesn’t make the irritating tapping noise constantly?

Thanks!

 

[RoryD]

I'd be inclined to recommission the whole thing again and get all the air out of the system

 

[ShaunCorbs]

Any pictures of said guage ?

 

[oz-plumber]

Is the said gauge dry or wet?
Dry gauge - the needle is in air
Wet gauge - the needle is in liquid.

Generally use wet gauges on commercial equipment