Manufactured in USA. PDS Drain checks allow perimeter drains to continue to function while maintaining suction on installed radon system. Installed horizontally with flapper to allow water to drain out. Comes with a 3×4 ADS snap reducer to make it compatible with most ADS or PVC perimeter drain systems.
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Top Selling PDS Drain Check
Hand made in Colorado, USA. Daylight drain check valve by PDS Radon Supply
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