“It works, no more boiler leak on my Sylvia V2, but I did have to replace my group head because of peeling copper plating inside. I carefully blocked smooth the boiler mating surface at the group head to insure a good seal with the new group head. Though it`s not required, I greased the gasket (O-ring) with hi-temp silicone grease. That`s mainly because the old boiler was stuck to the group head pretty good and I intend to replace my boiler before too long because it has the old style fixed copper heating element. That`s the next project.”