What to Do About Air in Water Pump Lines February 17, 2017 By Editor & filed under All RV Blog Entries, Ask an RV Expert. When I use the water pump in my RV there is always air spitting out of the faucets and shower head. Why does this happen and how do I fix it? I checked and there are no water leaks. Could I need a new pump? Thanks in advance for any help. Read more »