I kinda agree with you on that even though it might be borderline. I have tested Bridge, 910, CX12 in a toaster oven. Bridge started to loose mechanical integrity at about 300. CX12 and 910 survived up to about 375. The test was to heat a 50x50 tube that was 100 long printed with a 4mm wall a .8 nozzle 1mm layer width .4 layer height governed at 8mm3/sec. A tube was placed on a solid surface and hit with a hammer after printing and they did not deform and then they were heated for over and hour starting at 250 and then quickly taken out of the oven and hit with the hammer. as I said at about 300 Bridge deformed and stayed deformed. Interestingly CX12 at the end started to crack as it seems to get a bit brittle when completely dehydrated. Whereas both bridge and 910 performed better in completely dehydrated state. OTOH CX12 is the hardest of the 3 and probably the toughest under normal room temperature condition and also a little tougher to print. Maybe that is cause CX12 claims to be true Nylon whereas both bridge and 910 are an alloy. I also tried some inexpensive true Nylons some refer to as "Fishing line" And those need to be rehydrated before use (wrap them in a wet towel after printing if you believe in the slow method or drop them into a bucket of water for 24 hours or boil them the boiling is the fastest but you risk over hydrating them which can mask print flaws for a short period like poor layer adhesion and then when it stabilizes the problems show up (like poor layer adhesion due to under extrusion as an example) This probably in a water hose would be less of an issue. I think it would be quite interesting to see how far you can push Nylon in that. And his question was with his printer. So I might restate it that way "With his printer Nylon might give him the best chance of success even though its probably not advisable - but it would definitely be interesting to find out" .