sewer smell

Check and see if your black tank has a flush valve where you can hook up a "regular" green/yellow garden hose to it.(We carry a 25 footer for this only) There is a spray nozzle on the part that goes inside the tank that helps clean the tank walls, etc. If you don't have one, they can be purchased and installed about 8-12 inches below the top of the tank on the outside, or have it installed. Read the install instructions very carefully and "don't" overtighten the screws that go into the side of the plastic tank. These flushers are especially helpful for those times your black tank isn't technically full enough to dump but don't want to leave the contents in there. I believe these should be a standard item for all rvs. Always stay and monitor the flushing process which should take about 10 minutes. The black tank drain can either be closed then opened at the end of 10 minutes or left open during the 10 minutes. Do not walk away for any reason until your done.:B When complete, go inside the rv, fill the toilet tank bowl full of water about (3) times and flush to put some water back in the tank. Your done.

Black Tank Flush Valve