Pressure going down - Central Heating job in Watford, Hertfordshire

Job description

The pressure in the system keeps going down and i have to keep topping it up for the last 3 weeks. I top it up every other day. There seems to be a small leak from one of the pressure valves as the open pipe with the black bit surrounding it is constantly wet.

All three valves lead to one pipe so dont know which pressure valve is faulty. Need plumber to replace all 3 valves.

also if you can do a whole system check as the pressure in the shower is not as good a year ago when the megaflow system was installed.

I have a system boiler - with a megaflow system

thanks see pics for details

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came diagnosed problem ! fixed it .gave options . friendly timely and professional.