KnowGood wrote:Top of sight glass is too much. Don't go over the fill ridge (which no one knows about), which is the line going all around the boiler near the top.
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For those that didn't know why that was there, now you do.
You do need to site your source on this (mis?) information. Under filling is more of a problem than overfilling with a Pav. If you look inside a Pav you will see that the group is fed from a tube that reaches close to the bottom of the boiler and that the safety valve is well above the top of the sight glass.
Also if we are going to "theorize" about the joint in the boiler here are my almost worthless 2 cents. They have the joint at this point to help resist flexing in the boiler body. The lever via the group really works the boiler hard (notice flexing at boiler /base) Having the joint just below the group like this helps stiffen the column. Additionally perhaps the joint is not filled (smoothed over) because the fill might crack from the group stress.




