We have had a copper hot water cylinder with an expansion vessel fitted around 2003. We had a leak on the second expansion vessel in this time. While the first one just vented water from the air inlet valve at the top and was not too much of a problem until I got a new one, this "new" one had caused a major and sudden leak where water has bypassed the flange and caused the vessel to rust and leak.
Are there any expansion vessels that will not cause a leak?
Don't get me wrong, I love changing them, but the manufacturers wright in the instructions that there are no perishable and serviceable parts on the vessel.
Now I have got one from Screwfix which is certified to a higher pressure than the last ones.
The vessel is charged to 3bar and we have a pressure reducing valve and blow off valve fitted.
Are there any expansion vessels that will not cause a leak?
Don't get me wrong, I love changing them, but the manufacturers wright in the instructions that there are no perishable and serviceable parts on the vessel.
Now I have got one from Screwfix which is certified to a higher pressure than the last ones.
The vessel is charged to 3bar and we have a pressure reducing valve and blow off valve fitted.