Water heater filters are contained in a filter housing.
Hot water heater filter location.
Install a water heater filter system on the cold water line that feeds the heater to eliminate or sequester these minerals before they get into the heater and create scale.
Most manufacturers prefer that water heaters are near power sources so that the wiring is as short as possible.
Since it would not be economical of me to provide the codes for every town in the united states and canada let me just give an example.
Place it under the heater and pipe it into an adequate drain for water disposal.
Water heater maintenance clean the filter.
The tac or scale net filters use a big blue housing that installs on the cold water line to feed the water heater.
The relief valve often located at the top of the hot water tank will also need to be piped to an open drain.