Manual Vent Gas Cap For Old Style Portable Boat Gas Tanks With Twist Valve For Adjustable Venting 621501-10 Replacement Cap Black Marine Fuel Tank Part Compatible With Moeller And Tempo Portable Tanks

Manual Vent Gas Cap for Old-Style Portable Boat Tanks
✔️ Single-pack vent cap with twist valve for old Moeller/Tempo tanks

This replacement cap is designed for old style portable boat fuel tanks, including Moeller and Tempo models. It provides adjustable venting via a twist valve to prevent pressure buildup and leaks on deck or in storage.

✅ Compatible with models 031103, 031106, 031109, 031112, 031212, 620003, 620049, 630012, 630013, 630014, 620040, 720040, 730014, 730025
✅ Fits Attwood 12/6/3 gal tanks and common boat tanks
✅ Color: Black
✅ Material: high hardness plastic, corrosion-resistant
✅ Easy to use: no tools required; twist to vent and seal

💡 What is a manual vent gas cap used for on portable boat tanks? - Handy venting to prevent pressure buildup and leaks - Works with old style Moeller/Tempo tanks and many common models - Made from tough plastic that resists corrosion and aging - No-tools operation: twist to vent and seal