Camco Quick Turn Permanent Waterheater Bypass Kit 
Permanent Waterheater Bypass Kit
Save on antifreeze when you winterize with this easily-installed water heater by-pass kit. Sturdy, brass backflow preventer and 100% shut-off valve lets you by-pass the water heater with a single turn.
We Also Recommend
Lumitec SeaBlazeX2 Spectrum LED Underwater Light - Full-Color RGBW 
Ancor Adhesive Lined Heat Shrink Tubing (ALT) - 1" x 3" - 3-Pack - Black