Whether brass PEX fittings can be reused depends mainly on the current condition and usage of the fittings.
First, brass PEX fittings are usually designed and manufactured to be optimized for single installation and long-term use. They are precisely machined and tested to ensure that they can provide reliable connections and seals when first installed. However, once these fittings are installed and used in the piping system, they may be affected by various factors, such as pressure, temperature fluctuations, media corrosion, and possible physical damage.
When considering reusing brass PEX fittings, you need to carefully evaluate their current condition. If the fittings have not been damaged during the removal process and there are no obvious signs of corrosion or wear on the surface, then technically they can be reused. However, it should be noted that reusing fittings may increase the risk of leaks at the connection, because the sealing performance of the fittings may decrease with time and the number of uses.
In addition, the overall safety and reliability of the piping system needs to be considered. In some cases, in order to ensure the long-term stable operation of the piping system, it may be preferable to use brand new fittings for installation.
