How to Avoid a Frozen Septic System

As the weather begins to get colder in many parts of the country, it is important to remember to care for your septic system.  While most landowners who live on their land full time are aware of what to do and what not to do, many who own property which is their weekend getaway, hunting camp, or hobby farm, may overlook taking care of their septic system until a problem arises.  Our friends at the University of Nebraska Extension Service have six tips to help you keep your system in working order even during the coldest of seasons.

1. If you don’t remember having your septic tank pumped, have it pumped and the system checked by a professional before the ground freezes. Professionals recommend having the system pumped every 3 to 5 years, although the ideal interval varies depending on water usage and the size of the system. However, 15 years between pumping is too long!

2. Let the grass over the pipes, tank, and soil treatment system get a little longer in the late summer/fall. This will provide extra insulation and help hold any snow that may fall. Place an 8 to 12-inch layer of mulch over the entire system to provide extra insulation. This mulch could be straw, leaves, hay, or any other loose material that will stay in place and will not compact. This is especially important if you have had a new system installed late in the year and no vegetative cover has been established.

3. Use water, the warmer the better if your system is starting to freeze. Normally we advocate water conservation, but if freezing is a concern, increase your water use from low to normal. Do at least one warm/hot water activity per day, such as a load of laundry, using your dishwasher, or taking a hot bath. Never leave water running all the time, as this will overload the system with too much water.

4. If you know you are going to be gone for an extended period, plan accordingly. Have a house sitter flush the toilet, run some hot water, and maybe even do some laundry; in other words, use sufficient quantities of water in the home regularly. Otherwise, have your tank pumped before leaving. One word of caution about empty tanks- if you live in an area with a high water table, only have the tank pumped if it was designed for high water table conditions; it may “float.” Also, some plastic tanks may not be able to withstand soil pressures if left empty. If a tank is left full for several winter months when no one is using water, the sewage will get very cold in shallow tanks and can even freeze in very cold temperatures. If you return home before temperatures start to rise, the effluent leaving the tank will be cold. By starting with an empty tank, you can start fresh with warm effluent. If you use a cabin on a limited basis during the winter months, this may be a good idea as well.

5. If you have appliances that generate very low flows such as high efficiency furnaces, put a heat tape on the pipe, and while on vacation have someone come by and run warm water for a while. Alternately, you could install a small condensate pump that holds and discharges 2 gallons per cycle.

6. Keep all types of vehicles and high traffic activities off the system to avoid pushing frost down toward system components. Keep an eye on your system. If any seeping or ponding occurs contact a certified onsite professional to help determine the cause and remedy.

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