We have a 2006 Damon Astoria, type A motorhome.
Recently the gray water system has begun to "gurgle/burp" when we are showering, regardless of the waste water level in the tank. There are no problems with any of the drains operating slowly, etc., but the gurgling/burping is a recent, disconcerting development. We are full timers and keep our sewer valve connections closed until we are emptying full tanks.
Any suggestions?