We use 6 metre lengths as regular with Storz fittings. These fittings hook up in a short time so we are able to use many lengths of hoses to get to the connection points. Remember to talk to our professional workforce who will specify the portions of hoses and fittings https://industrial-boilers-uk65420.livebloggs.com/44714955/the-ultimate-guide-to-industrial-boilers-uk