heater hose cummins

Moved from Forum Technical Support

I can't say how easy or hard it is to replace but I would spend the extra bucks and buy silicone heater hose so that you will probably never have to worry about it again for the life of the RV.
Silicone hose does require special hose clamps as well.

Replacement difficulty depends on the chassis and if everything is enclosed underneath. Motor type and coach length does not give any info worthwhile

Look at the last few posts here. He details removing and replacing the heater hoses in a Monaco Dynasty.

http://www.irv2.com/forums/f115/mods-upgrades-to-our-2003-dynasty-237276.html

There is no need to replace the whole hose. I suspect that it broke down in the engine compartment where it is exposed to lots of heat, oil, fuel, etc.

It is not unreasonable to replace the engine-room section of the hose and use a metal barb to barb fitting to join the new engine room hose to the original hose that is protected in the basement. Metal barb to barb and two hose clamps on each hose at the splice(with screw part 180 degrees from each other) and you should be good to go.

Be sure to route the hose away from the exhaust and any location where it could chafe.