Or just buy a new gasket, buy all new bolts, buy a Heli-Coil inserts and tool kit, drill and tap the stripped out bolt holes, install the Heli-Coils, new gasket and new bolts.

Seems like that would be easier than trying to replace the entire valve.

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Jerry Peck, Construction / Litigation Consultant
Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )