Expansion tanks are available in a variety of sizes depending on your water pressure, the size of the actual water heater, and the temperature the water is heated to. The tank contains a pressurized bladder. In this case, your well water system is closed, and an expansion tank will be required on your water heater. Your expansion tank is just a small water tank (usually with about a 2 gallon capacity) that is mounted near your current water heater and connected to the water line. We asked for this to be added and the sellers told us that per the codes for tank-less hot water heaters (California) a pressure relief valve nor a discharge line are needed. That’s because a tankless water heater only heats water on demand. POTABLE WATER EXPANSION TANKS Thermal expansion occurs when water is heated during non-use periods.The installation of a Pressure Reducing Valve (PRV), Check Valve or Back Flow Preventer ﾋ拂losesﾋ・the water system, leaving water with no room for expansion. The attractive thing about tankless water heaters is that you aren’t as restricted to where they can be installed as a storage tank system is. Manufacturer’s recommendations shall be followed . Locate the cold-water supply line, and determine which part of it runs horizontal (side-by-side) to the … How an Expansion Tank Works . How Tankless Water Heaters Work. Likewise, if your home runs on an open water supply system, where excess water goes back into the municipal water supply, it won’t … Tankless water heaters are much smaller than units with a storage tank, allowing them to be wall-mounted. When the water (inside the water heater) cools, the water is moved from the thermal expansion tank back into the water heater’s storage tank. Expansion tanks are for expansion of the hot water (domestic)..because.... the water utilities started to require check valves at the service points. Tankless water heaters — also known as demand-type, on-demand or instantaneous water heaters — heat water directly, without the need to store water. For homes that use 41 gallons or less of hot water daily, demand water heaters can be 24%–34% more energy efficient than conventional storage tank water heaters. If you do not have a … No. If your water is on a closed system (the water can flow into your building but not out), an expansion tank or other approved thermal expansion device must be installed on your water system. I spoke to a representative with EcoSmart to help me determined the size of the tankless water heater we needed and what the requirements for that size unit would be. How to switch from propane tank water heater to electric tankless water heaters: steps to take. It reduces the pressure on the wall of the heater tank, thereby making the unit to last longer. Also, at the time of writing this, an expansion tank is required on all water heaters installed or replaced in Little Elm, TX. Water heaters expand when they get hot, and the expansion tank serves as a backup when this occurs. They are usually cheap and easy to install. Positive lock retention system controls compression in the diaphragm connection, eliminating air loss or water leaks in hot water expansion tank. You don’t need a water heater expansion tank if you have a tankless water heater since there is no tank and no buildup of pressure. Where a storage tank-type water heater or a hot water storage tank is installed in a location where water leakage from the tank will cause damage, the tank shall be installed in a galvanized steel pan having a material thickness of not less than 0.0236 inch ( 0.6010 mm) … Water expands as it heats up, and without an expansion tank attached to the water heater, a closed plumbing system can experience damage from this thermal expansion.For example, when water is heated from the temperature of 50 to 120 degrees Fahrenheit, … Thermal expansion tank installed to protect water delivery system per CPC 608.3 & CMC 1006.0 if a pressure regulator with an integral back flow preventer is installed on the domestic main supply line. A sediment trap is required per CPC Section 1212.9 . A tankless water heater like this one does not need a thermal expansion tank. EcoSmart customer service is very helpful and knowledgeable when help is needed. WHY? The thermal expansion tank eliminates the pressure (of expanded water volume) putting avoidable stress on the water heater and the water … Interior powder coating is permanently bonded to the tank shell for ultimate protection on the water side of the water heater expansion tank. When replacing a storage tank water heater with a tankless water heater, the gas line connected to the water heater and the pipe size of each section to the water heater shall be sized to meet the increased BTU demand rating. Whether installing in bulk for a new construction build or replacing an old tank, the setup and tools needed for a tankless water heater installation are entirely different compared to a traditional water heater install. The energy saving potential of tankless water heaters has led many consumers to consider replacing their storage tank water heaters with tankless models. Heavy duty butyl rubber diaphragm ensures long life. [Tankless water heaters] can be 8%–14% more energy efficient for homes that use a lot of hot water -- around 86 gallons per day. Last update on 2020-12-01 / Affiliate links / Images from Amazon Product Advertising API. 4. Not only is fluctuating water pressure annoying for you, but it’s also really bad for your water heater and your entire plumbing setup. Once you have your total flow rate and the required temperature rise, you can find the right-size tankless water heater for your home. A thermal expansion tank is a pressurized tank that sits on your cold line – typically near or on your water heater.