We use 6 metre lengths as common with Storz fittings. These fittings join 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 can specify the quantities of hoses and fittings in https://industrialboilersuk99887.blogdun.com/38803736/5-simple-techniques-for-industrial-boilers-uk