We use 6 metre lengths as normal with Storz fittings. These fittings join very quickly so we are able to use a number of lengths of hoses to get to the relationship points. Make sure you speak to our expert staff who will specify the portions of hoses and fittings https://industrialboilersuk53208.dm-blog.com/38149218/industrial-boilers-uk-things-to-know-before-you-buy