Having read Ed Siretts sealed heating system FAQ (cheers Ed), I'm assuming our Ferroli Optima 901 has a faulty pressure release valve as it needs topping up everyday.
I topped up to ~2 bar, and noticed the discharge pipe started dripping, which pretty much confirms a faulty pressure release valve, right??
A possible solution that Ed suggests, short of getting a new valve, is to "dislodge dirt on the valve by operating the test knob (often red plastic) very briefly".
However, I can't fing my test knob! Is this inside the boiler, attached to the valve? I really have no idea about boilers. What would be the procedure for getting to the test knob?
If the test knob solution didn't work, I notice I can get a new valve from the web for about £13. Is it a skilled job fitting it, or is it just a screw-in thingy?
Cheers,
Ted.