Originally Posted by wcisse
Is there anyway retrofit a Hydrapac blader & drink tube into a R35?
Unlike the R15, R20 and - to a degree - the R25; the R35 wasn't designed to be hydration kit compatible, so there is no official way of retrofitting a system in this pack.
The pack itself is too deep to place the reservoir inside and the zipper arrangement doesn't allow for the tube to be routed effectively. The reservoir will fit in the external mesh pocket, which has the shock cord overlay, to help keep items in place, and the drinking tube can be routed over the shoulder and held in place on the harness using the same Velcro tab as on the R25. However, this is unlikely to keep 3 liters of liquid, fully secure.
If you want to give it a go, you might be able to 'McGuiver' something that works for you, but, we can't really recommend it.
Hope that helps,