This has the look of a professional factory
installation. Seacocks are
bronze, which are virtually indestructible and stainless ball valves all indicate a lifetime
installation.
Many proven
hull designs incorporate
keel tankage as a feature of utilizing space and balance. The simple filter likely indicates a
water tank sediment filter; again, a common design.
To verify, look up the blueprints for this vessel. Tankage will be indicated in the
keel. If this is not a factory design, the posts regarding integrity destruction would apply. An array of aftermarket holes through the strongest part of the
boat would both be a
danger to a bolted lead keel, as well as a
danger to the
hull 'on the hard', as load would be unevenly distributed.
Additional to keel tankage, such hull designs indicate quite specific keel
lift points. If you
lift the keel on a tank vs. keel structural members, you risk rupturing the tank. Again, internal
tanks stopcocks are designed to stop such flooding
events, should the tank be breeched by running aground, hitting submerged objects, etc.
regards,
Dana Beausoleil, USN/USCG Ship Inspector