DES is required by law to publish guidelines and provide a copy with each approval for construction it issues. For existing systems, the recommendation is that the tank should be pumped at regular intervals (approximately once every 3 years) by a professional experienced with pumping septic systems. A neglected septic tank can become clogged with sludge and cause excess solids to enter the absorption leach field, causing failure.
How do you maintain a septic system?
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Precast Concrete (1),
Septic Systems (8)