Mud daubers, wasps, and spiders love the dark, protected openings of RV water heater and furnace vents. A single nest can block combustion airflow, trigger lockout codes, or cause carbon monoxide hazards. Camco's 42141 stainless steel insect screens press firmly into 3" round vent openings to keep pests out while maintaining full airflow -- protecting your appliance season after season.
These screens are purpose-built for RV water heater exhaust and combustion air vents. The fine stainless steel mesh stops flying insects, mud daubers, and small rodents from entering the vent tube, while the open-weave construction allows combustion gases and fresh air to pass freely. Each screen installs in seconds using the included installation tool -- no drilling, no adhesive, no tools required beyond what's in the box.
Sold as a pack of two, this kit gives you coverage for both the water heater vent and a spare for a furnace vent or as a replacement down the road. The stainless steel construction resists corrosion from road moisture, rain, and cleaning chemicals, making these screens a long-lasting solution for full-timers and seasonal campers alike.
Corrosion-resistant construction stands up to weather, road spray, and repeated removal for cleaning.
Compression-fit design holds firmly in the vent opening without fasteners. Installs or removes in under a minute.
Each pack includes a dedicated insertion tool so you can seat the screen evenly without deforming the mesh.
Two screens per pack -- cover your water heater vent and have a spare on hand, or protect two appliance vents at once.
Water heater and furnace vents are among the most vulnerable openings on a travel trailer, fifth wheel, or motorhome. Mud dauber wasps are particularly destructive -- they can pack a vent tube solid in a single afternoon, causing ignition failure or, in worst cases, dangerous backdrafting. Many RV technicians recommend inspecting and cleaning these screens at the start of every camping season and after any extended storage period.
Camco's 42141 screen is sized for 3" round vent openings, which are standard on most Suburban water heaters and many Duo-Therm (Dometic) units. If you're unsure of your vent diameter, measure the inside diameter of the round exhaust or combustion air opening on the exterior of your RV before ordering. The 3" size is the most common for 6-gallon and 10-gallon RV water heaters.