I agree with Redback and the others, you only need the snorkel once!
I don't intentionally drive into deep water, but occasionally things don't go according to plan and the water is over the bonnet. I use the tops of the flares or the headlights, door handles as my comfortable depth. ( about 950 mm), but have accidentally been as deep as over the bonnet (1050)
If the snorkel is not water proof/ dust proof it's not a very useful accessory.
I view them as insurance just in case you make a mistake one day, that's aside from the cleaner cooler air aspect.
cheers simmo

