Whale's Mark V Manual Sanitation Pump is totally a sealed waste pump designed specifically for toilet flushing or holding tank pump-out. Features:• Bulkhead mounting• Totally sealed, tough plastic housing keeps in nasty smells• Large, virtually unblockable valves• Easy to clean with no tools required• Wide hose connections for maximum performance• Lightweight design and easily removable inspection port for easy, reliable operation• Ideal for use with Whale's DV5606 Diverter Valve with 1-1/2" portsSpecifications:• Flow Rate(s):11 GPM @ 45 strokes per min.17.5 GPM @ 70 strokes per min.• Port Size: 1-1/2" Large, nearly unblockable valves Easy to clean with no tools required | Mark V Manual Sanitation/Waste Pump