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Old 13 April 2025, 02:44   #1
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Tube PSI With Temp Changes Early AM Use

Hello all,
Greenhorn with a question...?
I've only owned my Rib for a few days now.
I have a job starting in 2 days for my RIB for the next 30 days that requires me to be in the water by 5AM.
I'm in SW Florida and lately there has been about a 20 degree fluctuation from day to night.
When I come out in the morning the tubes are soft but when the sun comes up they get firm right away.
I understand the concept of the air changing with the temperature.

Is there anything I can do to keep the tubes firm with conditions like that?

Or do I need to plan on pumping up in the early mornings and releasing air when the sun comes up?

TIA
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Old 17 April 2025, 01:00   #2
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Country: USA
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Make: AB Inflatables
Length: 5m +
Engine: 115 Yamaha
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So after about of a week of learning on my own as i go..
We have been having a wide range in temperatures lately so i've learned this affects tube greatly especially when they were super low to begin with.
I purchased a gauge to help with getting the tubes up close to the recommended PSI using the Super Pump that was included with boat.

I did find that one of the middle tube sections has a slow leak so ill be searching for the location and a possible fix.

Probably pretty basic information for some but might help another newbie like me.
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Old 18 April 2025, 09:19   #3
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Not a RIB owner but I'd have been thinking of a 12V pump for the cool mornings and fitting pressure relief valves to take care of the rest of the day as it heats up.
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Old 19 April 2025, 19:02   #4
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Florida I would put over pressure valves in BEFORE damage occurs. Pump up the tubes in the morning and let the over pressure valves work as the sun heats the tubes up.
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Old 20 April 2025, 16:13   #5
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If you haven’t got prvs pump up to pressure when it’s at its hottest and adjust as it cools from memory 10 degrees centigrade is about 6% increase in volume thus pressure
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