No. Continuously opertated re-circulating systems are very different from conventional hot water supply and central heating systems found in domestic properties, for which our porducts have been tested to, under eitehr BS 7291 2010 Class S or WRAS approval standard, and for this reason Hep2O producst must NOT be used on any contnuously operated re-circulating systems as they are not approved under the current version of these standards.