Hi,
Is it necessary to fit valve to every individual tube or can less be fitted due to the internal baffles and the pressure effect they may have on other tubes/sponsons?
Probably not 100% necessary but certainly desirable/good practice. Will put strain on the internal baffles if pressure unequal between chambers.
Have seen some new 3 chamber boats with only 2 prv’s - eg F-Ribs.
If you’re going to the bother/expense of speccing prv’s then one for each chamber in my opinion - our boat has 5 chambers and 5 prv’s.
Just be prepared to top up pressure more regularly as they will leach air.
