I recently moved into a new house. Upon inspecting one of the toilets i ended up having to replace its pvc flange as it had completely shattered. The problem is that while chipping away at the old flange i accidentally pierced through the elbow joint just about a quarter of an inch below where the new flange ends. I filled the pierced hole with j&b water weld quite liberally as it is supposed to hold a water tight seal up to 900 psi. My question is, is this enough or do I absolutely need to dig up the floor and replace the entire elbow?