pressure drops

[itschristof]

water pressure drops to .5 every 2 to 3 weeks have to keep restore ing pressure via filling loop,,but have no visable leaks any were ..the system is only 12 months old could there be a leak in the under floor heating ? i have a quantum 80 boiler and the chelmersystem2000 premium with a 200litre chelmer duel thermostore last night was the first nite it dropped to 0,,

 

[kevplumb]

eh

 

[brumylad]

could be a leak at the manifold.

 

[itschristof]

could be a leak at the manifold.

can see the manifold ,all is dry there ,,

 

[brumylad]

check the pressure in the expansion vessel with the system depressurised.
check water is not coming out of the expansion relief valve (copper overflow pipe) from the system / boiler when it first warms up.

 

[kevplumb]

nice one brum how did you know there was a manifold

 

[oilman]

Um....."underfloor heating"?

 

[kevplumb]

doh