Remeha Avanta 28C PRV Issue

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Hello,

I have replaced the PRV in my Remeha Avanta 28c last week and noticed a slight drop in pressure despite the PRV being new. The heating circuit and radiators are watertight having been tested.
I placed a receptacle under the exterior pipe on the outside wall and it has collected about half a cup of water over 48 hours. Clearly the issue still is with the PRV - any thoughts ?

Thank you
 
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Why did you replace the prv? Did you charge the expansion vessel and check the communication pipe?
 
Hello and thanks for the reply, I changed it as the boiler had been sitting unused for several months and when last used the dripping was occuring. When I took the old one off it was totally crudded up so seemed like the correct approach. I topped up the expansion vessel to 1 bar and 24 hours later it was still holding pressure. The condensate pipe is clear.
 
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I will check the pressure again on Friday when Im back at the house and see - maybe it tell a different story by then.
 
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And you left a drain point open whilst pumping it back up? If no, the you haven’t done the expansion vessel correctly. If yes, then either failed expansion vessel, connection or prv letting by.
 

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