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Wasps and mud daubers love building nests inside RV water heater vents, and once they do, the blocked airflow can cause real problems for the appliance. This Camco vent screen adds a heavy-duty stainless steel mesh barrier over the vent opening to keep flying insects out in the first place.
It's sized to fit Atwood 6-gallon and 10-gallon water heaters as well as Suburban 6-gallon units, and it comes with an installation tool so mounting it is a quick job rather than a project.
Confirm your water heater brand and gallon size against the fitment list above before ordering.