FATSAC Check Valve and Adapter [W744] Brand_Polk Audio Flange Diameter Inches: 4-7/8"

Flange Diameter Inches: 4-7/8"

Color coded and imprinted with international standard symbols

This rugged little waterproof light has a 20 lumen LED that operates typically for 30 hours continuously

marking channels or a great look throughout the marina or private dock

In addition to dual GFCI AC receptacles

FATSAC Check Valve and Adapter [W744] Brand_Polk Audio Flange Diameter Inches: 4-7/8"Check Valve and Adapter The FATSAC Check Valve and Adapter is a two part fitting that replaces the FATSAC Quick Twist Sac Thread Adapter that comes with ballast bags. The FATSAC Check Valve and Adapter is an optional upgrade for FATSAC ballast bags that replaces the standard Quick Twist Adapter. Just as easy to connect and disconnect as the standard fitting, the W744 Check Valve adapter also features an integrated check to prevent water from exiting