I'm not drained yet (well, sort of), but the anchor locker is now watertight with a drain hose routed to the shower sump manifold. This was a project I was thinking about for a long time, since the thought of muddy seawater draining free from the anchor locker to the bilge right underneath the v-berth never sat well with me. Originally, I planned on doing an overboard drain straight from the locker, but I just didn't want to put another hole in the boat.
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The old anchor locker |
The only problem was that if I installed a floor in the locker, the bobstay backing plate and bolts wouldn't be easily accessible anymore. The folks at HaveWindWillTravel just sealed their floor with caulking and didn't glass it into place, so with some work they could cut their way to the bobstay backing plate. I wanted something a bit more permanent.
I started with a chunk of cardboard and whittled it down until it fit nicely in the locker and sloped aft about 15 degrees. I found a 6" watertight access port and a 1" flush drain while digging around in my sizable spare parts bins in the shop (After owning and building many boats over the years, the entire attic of my shop is dedicated to boat parts that I just might need some day). The 6" port will allow for inspection and service of the bobstay backing plate and bolts.Next, I found a suitable chunk of 3/8" balsa core that I had laying around from when I re-cored the decks on my Alberg 35 (more parts that I knew would eventually come in handy). The balsa core is a 'sheet' of blocks glued to a scrim and the idea is that you fiberglass both sides to make a really strong, but very light 'board'. I could have used plywood, but this would be much better as long as you keep the water out of the core.
For the layup, I glassed 1 layer of 1708 biaxial glass on the bottom side and 2 layers of 1708 on the top. I put down a layer of plastic film on a flat surface followed by release fabric, then the bottom layer of 1708 glass. Then I mixed up a batch of epoxy, wet out the glass as well as the scrim side of the balsa core and set the core on top of the wet out epoxy. I mixed another, bigger batch of epoxy and took some time making sure the top part of the balsa core (including in between the blocks) was well saturated. Then I laid down a layer of 1708 glass, wet that out and laid down another layer of 1708 (and wet it out). Finally, I put release fabric over all of it and more plastic film before placing a flat sheet of plywood and some weights to squish it all flat. The next day I came back to a nicely hardened, perfectly flat piece of light, strong, soon to be anchor locker floor. I traced out the shape with the cardboard template I made and the cut it out with the bandsaw. I took the new floor over to the boat and fit it in place. Of course it didn't quite fit so I did some rasp work on the piece before finally calling it good. It didn't have to be that close, because it would be glassed into place.My initial plan was to duplicate the pipe that HaveWindWillTravel used to seal up the deck wash hose that comes up through the locker on the port side, but after wasting a lot of time, I decided to make a rectangular cover out of the leftover balsa board I made. There's a lot of angles in the locker and adding cylinders to the mix taxed my feeble brain a bit much and the rectangular tube was a much easier solution. I ripped a 2.5x12" and a 1.5x12" piece of the board and epoxied them perpendicular to each other. This didn't have to be particularly strong so once it hardened up, I rounded over the edge and covered it with 2 layers of 9oz glass and epoxied that up.I fit that (with a little help from my trusty rasp) and then cut out the holes for the drain and access port in the floor before coating all the exposed balsa edges with a layer of unthickened epoxy. Once that kicked it was time to glass it all in place. I mixed up a good sized batch of epoxy, then thickened it with 404 silica and shmooshed it all into a ziplock bag. I cut off one of the corners to make a nice 'epoxy pastry bag'. With both parts in place, I filled in all the edges with the thickened epoxy and then used a tongue dispenser to smooth all the edges out to a nice filet.
I let it set up overnight and the next day came back and laid in several layers of 9oz glass tabbing to really tie it into the bow of the boat. Some minor sanding the next day (it's the floor of an anchor locker, so it doesn't have to be perfect) and it was time to paint.After 2 coats of epoxy bilge paint and the loss of countless brain cells (my respirator is getting a bit old), I installed the drain and access port with 3M 4200 and started snaking the 1" sanitation hose forward from the shower sump manifold located on the frame just forward of the mast step.
I needed to drill through 4 frames total with a 1-3/4" hole saw to get to the anchor locker drain. Normally, I would have just snaked in around everything else along the centerline bilge of the boat, but it needed to have a continuous decline from the anchor locker with no sags where water would trap and get nasty. To reduce any chafe that would inevitably happen when hoses pass through plywood bulkheads, I did a simple CAD design of a hose pass through 'grommet' and 3d printed a prototype using 95A durometer TPU (fairly hard, but still flexible and shock absorbing). Amazingly, all my measurements were correct and it fit perfectly. I printed 3 more and headed back to the boat for the final install.Once I snaked the hose up to the anchor locker, I secured it on the drain with a hose clamp and then cut the hose to its final length at the manifold and secured it there. Because of the location of the manifold port in relation to the incoming hose, I had to do a horizontal loop (with a slight downslope toward the manifold) in order to connect it without any kinks, but it should do the trick. I still have to secure the loop with zip ties so it doesn't flop around and rub on anything and re-install the divider that separates the anchor rodes from the 2 hawes pipes, but I'm going to call this job done.
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The shower sump manifold |
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Hose and TPU gusset in action |
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The completed locker |