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I have a septic tank that I have to neutralize to join the collective sanitation. This pit was connected to a sump where also the water of a roof arrived. How to neutralize this pit? Another hypothesis: Can we, after having emptied it, connect the arrival of rainwater, which in the long term, would turn the sump into a well? Will I be in compliance with the regulations in force?

It is necessary to involve a sanitation company to completely empty your septic tank. You can then clean with a pressure washer and a powerful cleaner. Then empty it with a hose or pump. Leave air for some time before plugging in your rainwater. It can easily serve as a reserve rainwater to water the garden. And your "sump" will serve as an evacuation of overflow.

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