PSS 32mm shaft / 3in tube Dr. LED Cap is threaded 1/2 NPT

Cap is threaded 1/2  NPT to accept a barb fitting if you wish to vent overboard

Moeller Mercury 3/8 Barb Female Tank Connector Clip Style

Once gelcoat is restored

When the gauge registers empty

For protection of the main conductor circuit for DC winches

PSS 32mm shaft / 3in tube Dr. LED Cap is threaded 1/2 NPTPYI PSS Shaft Seal #02 32M 300 Shaft Size 32mm Stern Tube Diameter 3. 000" 3. 125"The PSS Shaft Seal is the number one selling marine mechanical seal worldwide and is installed as standard equipment by many of the worlds most reputable boat builders yards. The PSS Shaft Seal is also recognized as the premiere retrofit (aftermarket) seal on the world market. Certified by Bureau Veritas, ABS & Rina: Boat builders yards recognize the advantages and value