About 2 years ago I zoned my boiler into several zones. Six at first and now it is at 8. The zoning was done with 007 circulators and I purchased Taco Shutoff Freedom flanges for each pump.

They are 1" threaded. Today I noticed what appeared to be a leak on one of the pumps. On closer inspection I touched the upper valve and it just snapped in my hand.

The brass valve/flange assemble just cut around where there appears to be a seam.

Has anyone experienced anything like this on one of these valves or any other type of ball valve? Ican't figure out what would cause this other than a manf defect.