Using 25mm MDPE pipe - any reasons not to?

[dhaslam]

Mice are practically blind but they can run around in the dark provided they have something to line up with.

[InertiaM]

They are also reputed to knaw through PVC cabling but who takes precautions against tha eventuality;  maybe we are making mountains out of mole (rat) hills

Maybe it's all an urban myth - anyone actually willing to come forward with experience of the problem

Yes, unfortunately 

A couple of years ago, our factory went to lunch, and when we returned, one certain machine wouldnt work.  Loads of trips had gone, and there were other errors as well.  Four hours of problem tracing later, we found that a cable had been chewed by a mouse - that was nicely fried right next to the hole.

It's a standing joke in the factory now when a machine stops - "anyone seen a mouse?" 

[dinitro]

Personal experience;

Rat's gnawing through a blue MDPE water main.

Hear gushing unfortunately was on our side of the water meter.  Luckily could extract the pipe and put in a coupling. put down loads of steel wool
and stones to prevent burrowing.

Mice gnawing through electrical cable, spark jumping (popping noise) on a ring circuit.

Mice/ rat  gnawing through white plastic pipe... repair with coupling and use those electronic rodent repellents, plus a load of poison.

I would rather be safe than sorry.... any hole you see into your house is a potential mouse/ rat conduit... fill it!
if you do need to run a pipe though your house use twin wall and cement around the twin wall.  Fill the gap between the twin wall and MDPE
with steel wool.

On hindsight yes mice/ rats do see these pipes getting in their way and gnaw at them but in a couple of instances we had other exits and still
the critters insisted on gnawing though pipes!

dinitro