Let me add that that the anchor drain can be blocked at the frwd head drain. There is a “T” where the anchor locker drain and shower intersects. Hair from the shower can clog the in the T and prevent the locker from draining.  Installing a “Y” helps. You may also find that a filled anchor locker will let the water migrate into the portside lockers  under the settees. This happens on a starboard tack. I installed a separate small bilge pump under floor board next to the head thru hull as a back up. Finally, I suggest using  modeling clay to plug the chain fall at the deck. It doesn’t harden and comes out when letting the chain out.  I had also had a second chain locker access made on the portside of the bulkhead.  This allows me  to spread the chain out due to limited size of the locker for my 325’ of chain. Hope you don’t have to learn the hard way as I did.  This last haul out I removed all the chain to paint it (red, White, Blue every 25’) and found leftover delaminated plywood pieces  from a lazerette  floor repair.

Unfortunately this took me years to sort this out.

Cheers,

Ric

Bali Hai, SN24, Annapolis