There are many reasons why you must have yourÂ water heaterÂ installed by a professional. Only a licensed plumber knows and must follow the code when installing aÂ water heater. The way yourÂ water heaterÂ was installed 10-15 years ago will not be how it should be installed today. There can be many â€œcode violationsâ€ which need to be identified and fixed when installing theÂ water heaterand before a final inspection is done. These are necessary to ensure the unit will operate in a safe manner. There was close to half a million residential house fires in 2009 and a portion of those fires were caused by gas fired appliances likeÂ waterÂ heaters being installed incorrectly. There are also many deaths and sickness reported from carbon monoxide inhalation from gas burning appliances likeÂ waterÂ heaters. If yourÂ water heaterÂ isn’t vented properly or the room is not provided with sufficient air ventilation it can result in an environment with high levels of carbon monoxide. Colorless and odorless carbon monoxide cannot be detected by humans. It can make you very sick and even lead to death if you are exposed to it for long enough. Something else to consider is the fact that if your incorrectly installed, un-inspectedÂ water heaterÂ causes fire damage to your home theÂ insuranceÂ company has grounds to dismiss your claim because of negligence on your part. These dangers are very real and that is why these codes are created and enforced. Don t take the risk, have yourÂ water heaterÂ installed by a licensed professional.