The ClearPlus 77 Series HD Windshield Wiper Blades like part # CP77321 are great windshield wipers for motorhomes. That said, if the rubber becomes worn or damaged you would need to replace the entire unit as the rubber is no something that can be replaced. I am not aware of any windshield wipers for motorhomes with this refillable feature you referenced. view full answer...
That small hole that you are seeing on the Phoenix Faucets Catalina RV Shower Valve w/ Vacuum Breaker # PF223304 and other RV specific showers is actually a part of the vacuum breaker. The vacuum breaker is where you would hook up the shower heard and is designed with that small hole in order to prevent backflow contamination of your clean water supply. view full answer...