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For a fully-foamed hot tub, freezing typically occurs when the temperature drops below 28 degrees Fahrenheit and remains at or below this level continuously for a minimum of 36 hours. If your hot tub and pumps are still operational, however, the water circulates, and this continuous movement helps prevent freezing, even in very cold conditions. This circulation, along with the insulation provided by the foam, helps maintain the water temperature and prevent it from freezing during extended cold periods. Still, if you’re not planning to run it regularly, be sure to winterize the hot tub properly to prevent damage from freezing.

The most common types of backflow preventer devices depend on the purpose of the installation. For example, Portland.gov states that the double-check valve assembly and the pressure vacuum breaker assembly are most commonly used in irrigation systems, while the National Fire Protection Association (NFPA) states that double-check valve assembly and the reduced pressure zone assembly backflow preventers are best for fire protection systems.

Ask a plumber for recommendations on the best backflow preventer device for your home.

The cost to unclog a drain varies based on the location and severity of the clog. For simple clogs within your home, such as in a sink, toilet, or shower, hiring a plumber typically costs between $110 and $350, with an average of around $200. Snaking a toilet or sink usually costs between $110 and $275, while a bathtub or shower clog costs about $225.

For a more serious clog in the main sewer line, the cost is higher. Clearing a main line clog generally costs between $200 and $600, with an average of about $380. However, prices can range from as low as $100 for snaking a minor clog to over $1,600, particularly if advanced methods like video inspection and hydrojetting are needed for a large or hard-to-reach blockage. Some severe main line clogs can cost upwards of $1,000 to clear depending on factors like the cause of the clog, its distance from an accessible cleanout, and whether the pipe is located beneath an occupied space (e.g., in an apartment building). You may be able to save money on minor clogs by using a drain snake or bladder yourself.

Installing a drain pipe costs about $600, ranging from $150 to $2,000, depending on the type of drain, accessibility, proximity to drain lines, and whether you’re installing new drain pipes or replacing old ones. Replacing a main drain line can cost over $2,000, whereas replacing a p-trap costs around $150 on average. Keep in mind that new water pipe installation projects are bid by fixture, like kitchen sink, toilet, or main water line. You can expect to pay $70 to $1,000 per fixture.