This is a picture of low point drains. Your fresh water should be similar but more than likely only one and white. Hold the fitting with a wrench or pliers and use another wrench or pliers to twist off cap. If there is no cap then you probably have a valve located somewhere else.
Are you sure there is anti-freeze in the fresh water tank? Most people don't due to the after taste. Good idea to sanitize though.
Good luck
__________________
You can avoid reality, but you cannot avoid the consequences of avoiding reality – Ayn Rand
|