Water Heater Booster - SODIAL(R) Hot Stainless Steel Electrical Element Booster for Water Heater DN25 2000W Package include: 1 x Stainless Steel Booster for Water Heater Use stainless-steel Booster for Water Heater if your water do not contain alkaline. Hot echoing quickly,integrating hot effect is good,high heating temperature. Temperature control is good,compliance in high efficiency. Durable and convenient to use,easy to install. Application range: suitable for all kinds of solar water heaters, air source heat pump heating, water heater, water tank, boiler, steam heating machine