GPSGuided wrote:For a tiny leak, the sign may just be a bubble stuck on the surface of the mat than a stream of bubbles trough water.
neilmny wrote:Is it a UL7?
hobbitle wrote:neilmny wrote:Is it a UL7?
Yeah
neilmny wrote:hobbitle wrote:neilmny wrote:Is it a UL7?
Yeah
It's best to not fully inflate one of these mats.
GPSGuided wrote:Find it hard to believe that there's a significant leak but unable to find. Patience and meticulous technique required I guess., like many laboratory experiments. Frustration no doubt.
skibug wrote:I would suggest that the amount of initial inflation is not a factor contributing to leaks - the high internal pressure will be caused mainly by you laying 50 to 100kg of weight on top, and will be much greater than any pressure created by oral inflation. Any one with some basic physics could probably expand on this further. Having said that, I agree that is not to good to over-inflate initially, because it makes the mat too hard to be comfortable - it needs to be slightly soft to have some "give".
skibug wrote:I would suggest that the amount of initial inflation is not a factor contributing to leaks - the high internal pressure will be caused mainly by you laying 50 to 100kg of weight on top, and will be much greater than any pressure created by oral inflation. Any one with some basic physics could probably expand on this further.
skibug wrote:Having said that, I agree that is not to good to over-inflate initially, because it makes the mat too hard to be comfortable - it needs to be slightly soft to have some "give".
madmacca wrote:Over inflation can cause problems when base camping (ie. where you are leaving your mat inflated during the day). A tent in full sun can get pretty hot, and if you inflated your mat hard in the cool of the evening, the internal pressure can get even higher with very warm temps during the day. I often suspect this when I see mats where the internal baffles and channels have gone. If you are leaving your tent set up during the day, it is a good idea to let a little air out in the morning - should take just a couple of pumps to get it back to original pressure in the evening.
Orion wrote:madmacca wrote:Over inflation can cause problems when base camping (ie. where you are leaving your mat inflated during the day). A tent in full sun can get pretty hot, and if you inflated your mat hard in the cool of the evening, the internal pressure can get even higher with very warm temps during the day. I often suspect this when I see mats where the internal baffles and channels have gone. If you are leaving your tent set up during the day, it is a good idea to let a little air out in the morning - should take just a couple of pumps to get it back to original pressure in the evening.
I've always taken care to release some air from my pad when I'm leaving it set up for the day.
But I'm not sure it's really a problem. A temperature change of 40°C would only increase the pressure by 15%.
madmacca wrote:Yeah, the external seams are sealed pretty strong, and you're not going to burst it just from the temperature/pressure differential. But typically the internal channel seams and baffles aren't nearly as strong.
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