Dufour Owners Association: new forum reply to Quick Hot Water Calorifier PRV

New reply from Steve Treadwell

<p>Hi Matt Check your expansion vessel. It would have lost its expansion pressure .</p>
<p>it’s a classic case . There will be a data badge giving the correct expansion pressure.( normally 0.5-1.0 bar )</p>
<p>To carry this out shut off the inlet valve and pump. Open up a hot water out let . You will need a bicycle pump with a gauge . Take off the dust cap at the end of the the expansion vessel , and using the pump . Repressurise the vessel . You will note some more water run from the tap at the same time .as soon as this ends and you are at the correct pressure . Shut off the outlet tap .Remove bike pump.Turn on the inlet tap and pump . Now on heating the expansion will be taken up in the expansion tank .</p>
<p>if you loose pressure again in a short period you may need to replace the vessel . <br />Hope this helps . Steve </p>

https://www.dufour.org.uk/members-forum/quick-hot-water-calorifier-prv

Original Post by Matthew Dellar

Quick Hot Water Calorifier PRV

<p>Hi </p>
<p>Can anyone help with advice on a Quick hot water calorifier? </p>
<p>I seem to be getting a small amount of water leaking from the pressure release valve on the Calorifier after running the engine. I have swapped the PRV for a new one but this didn't make any difference.</p>
<p>Has anyone had this problem or can advise on what could be wrong and how to fix?</p>
<p>Thanks, Matt.</p>
<p>Javelin</p>
<p>325GL.</p>