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Every type of water heater has its advantages and disadvantages. Understanding those can help you decide the best type for your situation and budget. 

Pros

• Safer than gas or propane

• Doesn’t require extensive venting systems

• Lower upfront costs

• Simpler to operate

• No pilot light

• Easier installation

• More efficient heating than gas models

• Available as point-of-use (POU) and whole-house units

Cons

• Slower to heat water

• Longer recovery time

• Possibly higher operating costs

• Doesn’t work during a power outage

• Costs can increase without a 240-volt connection

While a water heater explosion is rare, it is a serious danger. Be aware of these critical warning signs:

• Sulfur or Rotten Egg Smell: This is a major red flag, especially for gas water heaters. It can indicate a gas leak, which could ignite and cause an explosion.

• Leaking Pressure Valve: If the temperature and pressure (T&P) relief valve is leaking, it may not be able to properly regulate internal pressure, creating a risk of bursting.

• Shaking or Rumbling: Loud rumbling or shaking from the tank can be a sign of extreme pressure buildup.

• Excessive Heat: If the exterior of the water heater feels unusually hot to the touch, the unit may be overheating dangerously.

• Rust-Colored Water: This can be a symptom of severe internal corrosion that compromises the tank's integrity.

If you notice any of these signs, especially a gas smell, you must act immediately. Shut off the gas supply to the water heater and call a professional plumber right away to prevent a potential disaster.

Most hot water heater manufacturers recommend replacing the anode rod about once every three to five years. Anode rods sacrifice themselves by collecting iron, limestone, and other minerals that would otherwise corrode your hot water heater tank. This abuse wears them out long before your water heater does. Check the rod when you remove it and replace it if more than 50% of the metal has been consumed. Check the rod more frequently if you have hard water or use a water softener. 

There are pros and cons to tankless water heaters. They are more efficient than traditional tank water heaters, and maintenance costs are lower. These units are also much more compact. On the other hand, they cost about twice as much to install as traditional tank water heaters and are more limited in terms of flow rate.