Quick Answer
High pH water can potentially damage certain types of plumbing systems, particularly those with galvanized pipes, lead pipes, or older cast-iron pipes.
The Risk of High pH Water
High pH water can corrode pipes and fittings made from materials that are sensitive to alkalinity. Water with a pH level above 8.5 can start to cause corrosion on galvanized pipes within 30 days to 1 year, depending on factors such as water flow rate, temperature, and pipe thickness. For example, a galvanized pipe with a thickness of 0.035 inches (0.89 mm) may start to corrode after exposure to water with a pH level of 9.0.
Effect on Home Plumbing Systems
The effects of high pH water on home plumbing systems may be more pronounced if the pipes are old or have existing damage. In such cases, even slightly alkaline water can accelerate corrosion and lead to leaks or pipe failure. Homeowners can check their water pH levels using a home testing kit, which typically includes pH test strips or a pH meter. If the test reveals high pH levels, it’s essential to consider using a water treatment system to reduce the pH level and prevent damage to the plumbing system.
Water Treatment Options for High pH Water
To mitigate the effects of high pH water, homeowners can consider installing a water treatment system that includes a reverse osmosis (RO) membrane or a water softener with a built-in pH adjustment feature. These systems can effectively reduce the pH level of the water, preventing damage to pipes and appliances. For example, an RO membrane can reduce the pH level of water from 9.5 to 6.5, while a water softener with a built-in pH adjustment feature can adjust the pH level to between 6.5 and 7.5.
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