Welcome to Defender Canada! 
Description
- Maintains prime by preventing backflow when the pump is off
- In-line design for easy installation in suction or discharge lines
- Fits 1" (25 mm) and 1½" (38 mm) ID hoses
- Compatible with manual and electric pump systems
Whale Non-Return Valve - LV1215 Item # 887918
Description
Features:
- Simple way to maintain prime in a suction or discharge line
- Stops Backflow when pump is turned off
- Designed to fit in-line
- Suitable for 1" (25 mm) or 1 1/2" (38 mm) ID Hose
- Suitable for use with manual or electric pumps