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R. from Wilmington, De writes,

How to treat drain flies breeding in sump pit?

Drain flies are breeding in stagnant water in sump our sump pit. Have tried treating with DF 5000 (pouring directly into standing water). Is this method effective?


Typically for sump pumps and pits it is good to use a foaming product which would be our invade hot spot.  Foam gets into the pump and cracks and crevices where the gel is really only meant for drains in your kitchen or bathrooms.

Answer last updated on: 04/11/2012

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