The union nut is a key connecting component for connecting the inlet or outlet port of ESPA pumps to the piping system. It is compatible with a whole range of models: Niper, Iris, Silen, Silen I, Silen S and NOX.
The original ESPA part guarantees a precise thread dimension and a tight connection that withstands operating pressure without water leakage. The plastic material is resistant to chlorinated water and pool chemicals.
The union nut is used during the initial installation of the pump or when replacing a damaged part. We recommend always combining it with the appropriate seal to achieve a reliable, tight joint.
