As documented with my own 25. The pipe broke inside the rubber grommet at the tailgate hinge.
The motor could be heard pumping, but only a dribble came out of the nozzle. Looking under the car. A stream of water could be seen. The water was exiting through a drain vent in the sill. Anyhoo. Onto a solution.
I cut the pipe at the split. I got two joiners and a piece of washer pipe. I then reassembled everything.
Now. Each joiner is at either side of the grommet (One in the body shell. The other in the tailgate). If the pipe splits again. I only have to insert a 6" length!*
* As I'm selling the Rover later this month. I won't have to do it.
Exactly what I did!
But previously I couldn't see any water arriving down to the nozzle, but a puddle on the ground under the left side of the rear bumper.
I took a piece of black rubber sheath protecting a Rover 75 throttle cable I bought by mistake and out of interest for me (cutting the cable), but very interesting as a pipe, because it is much more flexible than the original not so supple pipe and very appropriate in the grommet between the body shell and the tailgate.
I helped the rubber sheath into the grommet with liquid soap because it was a little tight, but just a little.
And I glued the 2 ends of the original pipe into both sides of the rubber part, with a sufficient common covering.
And it works fine now.
Congratulations for your sale to come, @Spudgun!
, even a bit sad for me because you were a kind, helpful and very supportive chap among the 25 owners.
BTW, did you noticed my thread about the very truth about my coolant loss?
Coolant loss: the very solution