Hi i have a flame hot water heater for sale its the same as Brodex sell
http://www.brodexbms.co.uk/products/other-cleaning-machines/flame-water-heater.
I have had this heater around 3 years and it has served me well, I'm only selling because I have bought a brand new system plus.
The Heater is due a service this is something I've done myself in the past . Also included is the diesel fuel tank that was tucked away under my van but that can be installed anywhere: £850 ono, I can email pictures of the heater if required.
I would swap for a 500 or 650ltr framed system Contact via email
info@pcwc.co.uk