Wasps, mud dauber nests, birds and rodents pose a serious threat to your
 RV water heater, furnace and stove by entering through vents and 
openings and building nests that interfere with air flow. Easy to 
install screens help ensure your vents stay from from costly invasion by
 unwanted pests.<br><br>WH600 For Suburban 10 Gallon Water Heaters