Whale Inline Non-Return Valve LV-1215 by Whale Water Systems $31.41 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Whale Inline Non-Return Valve #698-LV1215 Hose: 1" & 1-1/2" Simple way to maintain prime in a suction or discharge line Designed to fit in-line Use with manual or electric pumps