I have a Vaillant gas boiler that has a water pressure gauge and a Megaflow storage tank that also has a water pressure gauge installed near it.
My problem is that the water pressure gradually drops from 1.5 bar to zero over the course of about 3 weeks - I can re-introduce the pressure by turning a water tap that builds up the pressure (both gauges at boiler and tank read the same) but it always goes down gradually.
I cannot see any leaks and recently replace the Pressure Relief Valve in the Megaflow.
What could be causing the drop in pressure?
Thanks
My problem is that the water pressure gradually drops from 1.5 bar to zero over the course of about 3 weeks - I can re-introduce the pressure by turning a water tap that builds up the pressure (both gauges at boiler and tank read the same) but it always goes down gradually.
I cannot see any leaks and recently replace the Pressure Relief Valve in the Megaflow.
What could be causing the drop in pressure?
Thanks
