Plumbing drain for Yamaha swim deck cup holders

[Bruce]

Last week I added cup holders to the swim deck of my Yamaha SX230. You can see the details at Installing Cup Holders on Yamaha SX230 Swim Deck.

I purchased 20 feet of 3/8" tubing, 1 foot of 3/4" tubing, a 3/4" tee, a 3/8" tee, a 3/8" to 1/2" pipe thread adapter, 5 3/4" stainless clamps and 6 3/8" stainless clamps.

I built a tee to add the two 3/8" drains to an existing 3/4" drain for the bilge access cover.

This is the tee. In the final version I used a piece of hose that I cut from the factory hose instead of the 3/4" clear tubing shown lower right.



Then I installed 3/8" hose to each of the cup holders. I did not want to glue down the cup holders and risk getting silicone on the hydro teak so I wrapped them in duct tape until significant pressure was required to install. The deck is thick in this area so I expect them to hold. They are also prevented from flying out by the hose.



I cut each 3/8" drain line to a length where it had a little slack and the hose was not kinked but short enough to limit any sagging that might trap water.

Here is a picture with all the hoses joined together. (In my first attempt I spliced to a black 3/4" hose coming from the engine compartment that I assumed to be a floor drain. Turns out it is an alternate path for the cooling indicator water that exits near the transducer cable. While it was fun to have water shooting out of the cup holders I decided to replumb to use the drain hose from the bilge access cover.)



And this is what the cup holders look like

 

[Murf'n'surf]

Well done!
Is that the drain from the clean out tray?

 

[Bruce]

Well done!
Is that the drain from the clean out tray?

Thanks! The clean out tray drain is on the starboard side, this one is on port. Looking at the parts diagram (HULL DRAIN FITTINGS) I believe it is parts 15 - 18. Part #15 is labeled floor drain assembly. I had planned to use the clean out tray drain but this one was more accessible.

 

[Murf'n'surf]

Ahhh...so that must be the drain under the gas tank hatch on our old classic boats.

 

[Julian]

Except the 2007 doesn't have a gas hatch.....so perhaps its the ski locker edge drain?

 

[davel501]

I keep meaning to change those fittings out for stainless on mine. I did the stainless steel scupper and those sit lower.

 

[Glassman]

Hey Bruce, out of curiosity, since you won't be sealing the cups into the boat, have you sealed the edges of the hull where you made the cut? If not, I recommend that you brush some resin or epoxy liberally around the opening to seal the "wound" so to speak. That way you don't have to worry about water wicking into the hull and starting a delamination in that spot.