Can SharkBite be used on galvanized pipe?

No, SharkBite fittings should not be used on galvanized pipes. SharkBite fittings are designed for use with copper, PEX, and CPVC pipes. Galvanized pipe, on the other hand, is made of steel coated with a layer of zinc to protect it from corrosion.
There are a few reasons why SharkBite fittings are not recommended for use with galvanized pipes:
1. Compatibility: SharkBite fittings are specifically designed with features that allow them to work effectively with specific types of pipes. Galvanized pipes have a different material composition and require different connection methods due to their threaded fittings. SharkBite fittings rely on a push-to-connect mechanism, which is not suitable for galvanized pipe connections.
2. Corrosion concerns: Galvanized pipes are often used in older plumbing systems and can be prone to rust and corrosion over time. The zinc coating on galvanized pipes can deteriorate, leading to potential leaks or weakened pipe integrity. Attempting to connect SharkBite fittings to galvanized pipes could exacerbate these corrosion issues and compromise the reliability of the connection.
3. Proper sealing: SharkBite fittings are designed to create a watertight seal with compatible pipe materials. Galvanized pipes have threaded connections that require sealants, such as thread tape or pipe dope, to ensure a secure and leak-free joint. SharkBite fittings do not provide a compatible sealing mechanism for threaded galvanized pipe connections.

In situations where you need to connect or repair galvanized pipes, it is recommended to use fittings specifically designed for that pipe type, such as threaded couplings, unions, or compression fittings suitable for galvanized pipes. Consulting a professional plumber or referring to plumbing codes and regulations in your area can provide further guidance on appropriate fittings and methods for working with galvanized pipes.