Gravity Drain Sprinkler System – Basement Drain Insufficient

Photo shows pipes bending upward outside wall; basement drain 2 inches lower than pipe entry. Gravity drain unlikely to work.

Why

• Water traps in low spots outside.
• Proper gravity systems have multiple yard drains (valve boxes).
• Without knowing all drain locations, blow-out is safer.

Recommendation

Locate yard valve boxes for additional drains. Better: hire pro to blow out with compressor ($50–$75). Or buy compressor and DIY if experienced.