The Draft Jamaican Standard Specification is available for: 

Electrical Appliances Connected to the Water Mains - Avoidance of backsiphonage and failure of hose-sets (DJS IEC 61770) | Comments Form

The view the full-text of the Draft Standards document, please make request through the Regional and International Office of the Bureau of Standards Jamaica (BSJ), email: tbtenquirypoint@bsj.org.jm .