I have one of those rubber couplers. The problem I have is when I tighten the hose clamp down, the tile crumbles. It worked for a while but now I have no-joy! I would like to replace it but it is under a newly poured concrete slab that the Previous Owner poured to get the hot water heater up off the dirt and sometimes damp floor.
In the long term the electric hot water will be pulled and replaced with a more efficient on demand unit in the future "mechanical room" (see post in HVAC about moving furnace)
I think I have found a solution for my Sewage Pump. I am fortunate enough to have a Northern Hydraulics Store here in Virginia Beach and while rummaging the aisles, I found a 2 inch rigid suction hose for a mud sucker or de-watering pump. This will be large enough to handle the volume this pump puts out, its threaded at one end and can be mated to the pump, its 25 ft long and I can run that inside the existing tile. The tile empties on the edge of my property to a tiny stream.....run off from some springs and channels between the flat rock my house was built near.
I will try and get some more pics while I am there this weekend.