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<blockquote data-quote="Lurch" data-source="post: 95768" data-attributes="member: 6967"><p>All pressurised systems of any sort will have a PRV somewhere, unless it's been bodged in. As these are not used very often bits of grit and crud build up around them so if they are opened then the grit and crud jams them open, so sometimes removing and cleaning works. As it's a safety device though, I'd usually replace them but it can sometimes get the heat back on and confirms the fault.</p></blockquote><p></p>
[QUOTE="Lurch, post: 95768, member: 6967"] All pressurised systems of any sort will have a PRV somewhere, unless it's been bodged in. As these are not used very often bits of grit and crud build up around them so if they are opened then the grit and crud jams them open, so sometimes removing and cleaning works. As it's a safety device though, I'd usually replace them but it can sometimes get the heat back on and confirms the fault. [/QUOTE]
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