Roberto, I have Apollo seacocks in my boat that are 26 years old and work fine.
If I were buying
seacocks today I'd probably use Groco Flanged Adapters and ball valves.
That said, I don't think you can go wrong with any of the Groco or Apollo seacocks.
The Groco FBV Series are imported and seem to be a very good value.
The Groco BV Series are made in the USA and are probably the best seacock on the market today. They are not cheap
The Apollo seacocks, like I have, are made in the USA and seem to be very similar to the Groco FBV.
The Groco seacocks have two features that I like.
Patented field reversible handle allows you to select the closed position orientation (clockwise or counter-clockwise) that best suits the installation.
■ Handle has square hole to accept standard ratchet, to help reach valves in hard-to-reach locations and ease actuation of difficult to operate valves.
I don't think you could go wrong with either an Apollo or Groco product.
Seacocks by Groco and Apollo Conbraco
Consider using Groco Backing Blocks when you make the installation
. They make everything easier and eliminate three screw holes in your hull
. They fit the Apollo seacocks as well as the Groco.
Groco Seacock Backing Block
Please take a look my website before you buy the seacocks.