How to protect your drain field
The drain field is the most expensive part of your system. Protecting it is mostly free.
What you'll learn
- Why driving or parking over a drain field damages it permanently
- What you can plant safely (shallow grass) vs. what you cannot (trees, deep-rooted shrubs)
- How irrigation overspray accelerates failure
- Which household habits send solids to the field
Step by step
- Mark the drain field area so you and others know not to drive over it.
- Plant only shallow grass over the field — no trees, no deep shrubs, no garden beds.
- Aim irrigation away from the field — saturated fields fail faster.
- Spread laundry across the week instead of one big day.
- Never put fats, oils, grease, wipes, or harsh chemicals down household drains.
- Install an effluent filter on your tank if you do not have one ($125-$200 retrofit).
Safety note
A drain field is sized for steady, average flow. The fastest way to kill one is a household pattern of feast-or-famine water use. Spreading flow extends life dramatically.
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