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WARNING:
Some PRVs have an override pin. Modification of a PRV is not recommended. Over-inflation can cause
tube rupture or catastrophic valve failure, resulting in property damage, serious injury, and even death.
WARNING:
DO NOT OVER-INFLATE THE KEEL!
The keel does not have a dedicated PRV. When properly connected to the bow MBT via the keel hose
(with valve open) it will have the same operational pressure (4.4 psi) as the MBT.
Warm Weather Inflation Pressure
There is a direct correlation between air temperature and MBT pressure.
MBT pressure increases by about 0.05 psi for every 2°F increase in temperature (3 mbar per 1°C).
It is normal for MBT to gain air pressure on a hot sunny day. The PRVs will release pressure until correct psi is
achieved.
As a result MBT may appear to be partially deflated the following morning or as temperature drops.
CAUTION: Check pressure on morning after warm weather. Always re-inflate MBT and monitor the pressure
to confirm the section is not losing air due to valve leak or damage.
Inflation Pressure Maintenance
MBT and keel should be inflated and pressure verified when the ambient air temperature is between 65°F and
75°F (18°C and 24°C).
The PRVs will begin to regulate pressure at approximately 4.7- 5.0 psi (323-337 mbar) and reseat at 4.4 psi
(303 mbar).
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