Transom sink drain not working

[Bentsea]

I have a 2023, Ranger Tug 27 OB Northwest edition. The transom sink does not drain all the way to the outside of the boat. There are two other drains that are connected to it, the engine mount drain area and the large live well in the transom. As you can see from the photo included the drain exits at or below the water and appears to be clogged. When I fill the transom sink the engine mount drain will fill up with water. I have two questions:

1) what is the best way to clean this out. I clearly cannot remove the hoses to clean as that is the only thing keeping the water out.

2) should this be at or below the water as in the photo? We do have the dinghy stand with the dinghy on. The boat is only half full of gas with no one on board in the photo.

I am concerned that the only thing preventing the boat from sinking is a common drain hose and hose clamps with the drain outlet under water.

 

[Maggie Anne]

The one way flapper valve in the outlet should move freely in the outward direction. Mine had marine growth that caused it to stick and I had to go around it with a thin blade to free it up.

 

[4umfreak]

You can usually blow those out with a garden hose nozzle, wrapped with a rag and stuffed into a scupper drain. Just make sure that water isn't going the wrong way and flowing freely into your battery box. 🙄

The flaps, as in your picture, tend to harden & get stiff over time and gather more crud as they age. I cut a short slit in mine (2011) along the fold line, allowing them to open a bit easier.

I've always wondered about the wisdom of having them so low in the water. Maybe someone here can explain it!

 

[Bentsea]

The one way flapper valve in the outlet should move freely in the outward direction. Mine had marine growth that caused it to stick and I had to go around it with a thin blade to free it up.

One way flapper value makes me feel much better. Given its location will be the next challenge as its behind the swim ladder and is still in the water.

 

[Bentsea]

You can usually blow those out with a garden hose nozzle, wrapped with a rag and stuffed into a scupper drain. Just make sure that water isn't going the wrong way and flowing freely into your battery box. 🙄

The flaps, as in your picture, tend to harden & get stiff over time and gather more crud as they age. I cut a short slit in mine (2011) along the fold line, allowing them to open a bit easier.

I've always wondered about the wisdom of having them so low in the water. Maybe someone here can explain it!

I am not sure how the garden hose example will work. There is a T junction and a Y connecting 3 drains to the same outlet. I tried a similar method and it caused the water to fill another drain. Perhaps I could plug 2 of them and apply water pressure in the third.

 

[Maggie Anne]

I tried using a pressure washer but that didn't seem to work for me.

 

[4umfreak]

I am not sure how the garden hose example will work. There is a T junction and a Y connecting 3 drains to the same outlet. I tried a similar method and it caused the water to fill another drain. Perhaps I could plug 2 of them and apply water pressure in the third.

Yes, this!

 

[Gypsy]

I had the same problem on my C28. Behind the flapper valve, debris builds up. As the rubber flapper ages, it becomes stiff and doesn't allow the debris to exit the drain line. I bought a drain snake on Amazon $9.90. Key in (Drain Snake, Drain Clog Remover - Gutter Cleaning Tools Drain Cleaner for Toilet Sewer Shower Kitchen Bathroom Tub Clogged Drains Opener Cleaning Tool, Flexible Grabber Claw Pick Up Reacher (35 inch)). To clean the drain, lift the flapper valve, stick in the drain snake, and pull out the debris. The drain snake is not a sewer snake that you rotate. To use it, you compress the plunger on one end and it opens small metal grabbers on the other end. When you release the plunger the teeth close and hopefully grab the debris, which you can then pull out. Worked well for me.