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Les réservoirs d’eau et de gazole 8 août 2012 09:52, par NégofolVeritas est beaucoup plus clair : dans le règlement pour les yachts de - de 24 m, il est dit :
Ch8 2.2.4 Fitting of closing appliances
a) Satisfactory appliances which are permanently attached are to be provided for closing the openings of air pipes in order to prevent the free entry of water into the spaces concerned.
b) An automatic closing appliance could be required on an air pipe end if compliance with stability rules depends on the automatic closing of this air pipe.
See also Part B, Chapter 3.
c) Automatic closing appliances are to be of a type approved by the Society. Requirements for type tests are given in Ch 1, Sec 4, [6.2.2].
d) Where the tank venting system is not of an automatic type approved by the Society, provision is to be made for relieving vacuum when the tanks are being pumped out, and for this purpose a hole of about 10 mm in diameter in the bend of the air pipe, or at a suitable position in the closing device, is acceptable.
Les systèmes automatiques approuvés sont en fait des clapets à flotteur.
Il est donc clair qu’une vanne hermétique est exclue.