Do yo have a Suburban Water Heater in your Caravan or RV? Have you checked or had your Anode checked recently?
Genuine Suburban Replacement Anode.
The sacrificial anode equalises aggressive water action providing cathodic protection for the tank. The anode rod is a very important factor in tank life and should only be removed for inspection or draining. With regular inspection and replacement of the anode rod, the tank life can be greatly extended. Frequency of anode replacement will vary depending on the water conditions and usage. Operating the water heater without the anode voids to manufacturers limited warranty and shortens the tanks life of the water heater. In most conditions, anode rods should last at least one year.
The anode rod can be located by opening the water heaters exterior access door. It is positioned in the bottom centre of the water heater control housing. The rod can be replaced by anyone with some "handyman"!