Having watched the manufacturer's services engineer press the pressure relief valve button and then charge me £50 for each of the first two years, I now do it myself.
It's not difficult, but it is important to do it.
Does the PRV now leak or dribble ?
You need to be a bit careful using that method as it's very easy to get "crud" into the valve seat and often they will fail to re seat properly - and then tend to leak forever after as the seat face gets damaged
Less likely on domestic water to be honest as that should be "clean" - but not unknown
The last unvented system I had control over, I put in a bursting disk and discharge to drain just as a back up (because I wasn't going to pay for an annual service that is rarely undertaken correctly)
Having watched the manufacturer's services engineer press the pressure relief valve button and then charge me £50 for each of the first two years, I now do it myself.
It's not difficult, but it is important to do it.
Does the PRV now leak or dribble ?
You need to be a bit careful using that method as it's very easy to get "crud" into the valve seat and often they will fail to re seat properly - and then tend to leak forever after as the seat face gets damaged
Less likely on domestic water to be honest as that should be "clean" - but not unknown
The last unvented system I had control over, I put in a bursting disk and discharge to drain just as a back up (because I wasn't going to pay for an annual service that is rarely undertaken correctly)
