Hi,
First time poster after some advice regarding a Vaillant Ecotec Plus 937.
For some time now there has been a constant drip from the overflow pipe (the pipe from where the pressure relief valve vents). The drip happens whether the boiler is operating or not. The amount of water dripping from the pipe is now truly excessive - at least half a bucket every day.
I have recently topped up the pressure of the boiler's internal expansion vessel and also fitted a new external expansion vessel (large system - 20 radiators). The pressures are absolutely rock solid, with no wild swings in pressure, when the boiler is or isn't operating.
When fitting the external expansion vessel, it became obvious that the drip stopped with the mains stopcock turned off, and restarted when the mains water supply was reconnected - with the boiler powered off.
Despite the volume of water from the drip, there has never been a need to top off the system in the boiler - the cold filling pressure is constant at approx 1 bar.
Any thoughts?
Thanks in advance,
Mark
First time poster after some advice regarding a Vaillant Ecotec Plus 937.
For some time now there has been a constant drip from the overflow pipe (the pipe from where the pressure relief valve vents). The drip happens whether the boiler is operating or not. The amount of water dripping from the pipe is now truly excessive - at least half a bucket every day.
I have recently topped up the pressure of the boiler's internal expansion vessel and also fitted a new external expansion vessel (large system - 20 radiators). The pressures are absolutely rock solid, with no wild swings in pressure, when the boiler is or isn't operating.
When fitting the external expansion vessel, it became obvious that the drip stopped with the mains stopcock turned off, and restarted when the mains water supply was reconnected - with the boiler powered off.
Despite the volume of water from the drip, there has never been a need to top off the system in the boiler - the cold filling pressure is constant at approx 1 bar.
Any thoughts?
Thanks in advance,
Mark