Self-Draining vs. Traditional Sprinkler Systems: Water Use Comparison

Do Self-Draining Systems Waste Water?

A homeowner hears that self-draining (automatic drain) sprinkler systems use 2–3 times more water than traditional systems. The concern is whether the water drained after each cycle significantly increases consumption.

The Reality

Only the water remaining in the pipes after shutdown drains out—typically a few gallons per cycle. Compared to the hundreds of gallons applied during irrigation, this amounts to far less than 0.1% extra water. The claim of 2–3 times more water is false.

Considerations for Cold Climates

• Any system can be winterized with compressed air (blow-out) to prevent freeze damage.
• Automatic drains can fail over time and may need replacement.
• Manual drains or blow-out are often more reliable.

Contractor Selection Tips

• Request references and verify licensing/insurance.
• Get a detailed component list (head count, valve models, pipe sizes).
• Ask for a layout plan showing head placement.
• Compare bids apples-to-apples; cheapest isn't always best.