![]() The UPC guides the end-user to bury the supply piping not less than 12 inches below the local frost line for protection. Hose bibbs should be frost-proof, with integral backflow prevention capabilities or as required by the local jurisdiction. You may want to consider sealing and insulating the perimeter of the house. Insulation is the first resort against freezing. What about freezing conditions? Tiny houses built on a lifted frame may contain exposed supply lines, drain-pipes, traps, vents and other piping or tubes subject to freezing. These do work well, but permanent, long-term installations may require maintenance. Such systems contain mechanical pumps and moving parts essential for their functionality. These systems typically allow the waste to be pumped through a smaller diameter pipe. These systems liquefy waste and then pump it to the designated drainage system. Some models are designed to receive drainage from not only a water closet but also lavatories and bathtubs/showers within the same room. Macerating or sewage pump toilets may be an option where pumps are necessary to push waste uphill to reach a drainage system. Composting is a popular alternative and the NSPC contains detailed provisions on the composting system components, materials, design and maintenance. However, this is not always an option for more remote or off-the-grid conditions. The option to connect directly to a fixed drainage system where available would be encouraged, as it would allow for self-cleansing water closets that would leave the premise as soon as you flush. Where solar thermal systems are being considered, keep in mind that an auxiliary backup water heater may be required, as weather and storage limitations may not always be reliable in providing hot water.ĭetermining the location and construction of a tiny home is largely dependent upon how waste disposal from water closets is handled. The available sources and whether the tiny house will be mobile will dictate the type to consider. These water heaters run on natural gas, liquid propane gas or electricity. Water heaters can be a storage tank type or instantaneous type. The plumbing code contains water heater sizing provisions based on the first-hour rating method. ![]() ![]() Water heating for tiny houses is also very similar to a standard plumbing system, only in a smaller capacity. Sizing the supply and distribution piping will be dictated by the fixtures in the house and the corresponding water supply fixture units (WSFU). Where a fixed potable water supply and meter are available, the water supply and distribution would be installed in accordance with the plumbing code. SIMILARITIES BETWEEN TINY HOUSES AND LARGER HOUSESĪccess to potable water is required for drinking, cleaning and hygiene. One main difference is that much less material is needed and most tiny house plumbing systems are made up of only one kitchen sink, one lavatory, one shower and one water closet. Some may think there are major plumbing design differences for a tiny home, requiring intricate detail, but the plumbing systems are like a standard home. The appropriate local zoning codes will indicate where such tiny houses are permitted. Tiny houses are commonly built on fixed foundations or on wheels. ![]() The 2021 NSPC defines tiny houses as a structure that, where erected, is 400 square feet or smaller.
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