In-Line Check Valve 1"-1 1/2" Stepped ConnectionAll Whale bilge switches, non-return valves, strainers and pipework fittings are designed and manufacturers with highest quality at heart. Combine these accessories with your whale bilge pump for a robust bilge system tailored to your vessel.LV1215 In-line Check Valve 25mm / 38mm (1"/ 1 1/2") Stepped ConnectionWARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.