I've been to a boiler that had a ruptured pressure vessel. Replaced the vessel and checked the pressure. All seemed fine then the customer sent a picture of pressure over 4bar again the next day. The pressure relief didn't go off and when I got there it had dropped down to 1.5bar again. The pressure rise is happening when the hot water is on. The pressure relief has since gone off an released the pressure. Any ideas why this could be happening?
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View the thread, titled "Boiler pressure shooting up to 4 bar" which is posted in Boiler Advice Forum on UK Plumbers Forums.
Are you gas safe Rhys ?
A
Aire
Or filling loop passing
tube to the vessel blocked?
He’s gas safe
Plate ?
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Aire
Split in the plate heat ex?
If it’s dumping out the prv
A
Aire
The pressure dropping back down could be down to the prv opening then re seating. If it's only happening on hot water demand. Are the flow and return valves closed?
Other than that, is the expansion tank undersized?
A
Aire
We're not supposed to discuss repairs to gas appliances on the open forum, it should be in the private gas safe section.
O
Old Account
He meant we discuss gas related matters on open forum so everyone could read that
A
Aire
You can't, you need to get the gsr badge so you can gain access to the section. That's down to admin but it isn't a quick process
How big is the system? Rads
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