Compact Attwood V500 Bilge Pump provides more output and performance for boats up to 17'! Easy to install and maintain. Designed for recreational boats up to 17' in length. Features 500 GPH at open flow, 350 GPH at 3' head. Compact 3 5/16" height Twist-lock construction allows powerhead to be removed from pump base for easy impeller cleaning; Multi-position mounting bracket for horizontal or vertical installation; 3/4" I.D. hose size; Meets ABYC, U.S.C.G., and ISO standards; NMMA listed. 12V DC only. Attwood 500 Bilge Pump