I replaced the original macerator hose in two pieces in my 2006 Roadtrek 210P. The first piece attaches to the macerator and goes to the hose storage box. The hose is a Tiger Green TG100 1-inch inside diameter EPDM Suction Hose. The hose enters the storage box at the bottom and loops up to the top of the box. The Tiger Green hose is extremely durable but is somewhat stiff. The hose then attaches to a Thetford 21-foot Retracting Sani-Con RV Waste/Sewer Discharge Hose (part 70424). The Thetford hose is very flexible and compact, but can extend quite a bit.
The pictures show the setup. Note the thick attachment of the Thetford hose at each end. The hose had developed some small leaks after about 5 years. The leaks were due to flexing cracks near the attachment points. I taped the leaks with a waterproof black tape. Then I used my favorite sealer, Lexel, over the tape. I then cut sections from an old radiator hose and tiewrapped them over the Thetford hose to help seal and to relieve stress at these joints. Look closely and you see it is actually two different diameters of radiator hose over the Thetford. It looks clunky but it works fine. This hose is now 10 years old and working fine. If the Thetford deteriorates and develops cracks along its length I will replace it with another as this hose works great.
I apply 303 protectant to the Thetford hose once a year. This helps condition the hose material. I use 303 on everything rubber or vinyl (tires, electric cord, etc) and it seems to help reduce weathering.
Here is a link to the Tiger Green hose. I bought mine from a local distributor so I donít know how it would work ordering from this place. I donít recall the length I used but I am guessing 6-7 -ft. I think I bought a 10-ft length and then cut it down as I have a 3-ft section left over. That was 10-years ago so I donít recall exactly.
The Thetford hose is available from Amazon and other places as well.