re: Settling PVC Pipe Cracked - How to Stop

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My assumption is the 6" pipe is run underground to a catch tank. I assume the catch tank is above ground. So the 6" pipe probably has water in it at all times?

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Yes & no. It is underground to an above ground tank. Weight of water in the downspouts pushes water up into the tank. The system is overbuilt but it works great when it’s not cracked.

The no part is the pipes are drained during dry spells. Stagnant water between rains is cleared out instead of going in the tank. Also don’t want mosquitos laying eggs and getting in the tank.

So the 6” pipe gets very heavy and then comparatively light. Still shouldn’t settle tho.