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Repairing an underground water leak is not easy, and it’s likely not a job for DIYers. To prevent further damage, underground water leaks require the skills of a trained plumber. Underground pipe repairs usually involve digging a trench, repairing or replacing the pipe, and then filling the trench back up. However, some contractors use trenchless repair methods to protect your lawn from looking like a battlefield.

A back pressure valve is a control valve used on production vessels, such as separators, treaters, and free water knockouts. The valve holds pressure until a set point is reached, and then releases upstream pressure to reset. Back pressure valves are not safety mechanisms. Instead, they are regulators designed to keep the fluid, gas, or liquid mixture in a system at a certain pressure level to prevent bursts and other incidents.

Meanwhile, a backflow preventer is a safety mechanism that kicks in when the pressure has already failed and contaminated water flows in the reverse direction. Most backflow preventers consist of two one-way valves, or check valves assembled together. This design only allows water to pass through in one direction but not the other.

PEX pipes can freeze. While they are less likely to burst than rigid pipes like copper or galvanized steel, it is still possible. PEX is flexible and can expand as water freezes and contract as it thaws. However, this expansion can cause leaks around the pipe's connections. Furthermore, frequent freezing and thawing cycles can stress and weaken the material over time, increasing the risk of a future burst. Therefore, even though PEX is freeze-resistant, it is not freeze-proof, and standard insulation precautions are still recommended to prevent freezing.

Most of the time, the answer is yes, but with an enormous asterisk. While an increase in iron deposits isn’t likely to harm you if consumed, that doesn’t mean you should drink any brown water from your faucets. In our book, it’s better to be safe than sorry and opt for bottled until the issue is resolved.