Clogged Sink

Peter Z.

Peter Z.

New Member
Oct 13, 2019
13
Boat Info
2009 Sea Ray Sundancer 330
Engines
Mercruiser 8.1 inboard
The galley sink in my 2009 SD 330 drains very, very slowly. Is it OK to use a land-based chemical like Drano?
 
If it drains into the shower sump, NO. It will ruin the float switch. If not it would be OK I guess. If it goes to the sump, remove top and use wet/dry vac and suck the clog through. If fact do all the inlets, it's amazing what will come out.
 
I think most of the small sundancers drain greywater from the sink out the side of the boat, so you might just have to snake something thru. You can look under the sink, you'll probably find it is going to an above waterline drain fitting. I think the sump only gets drain from the shower and a/c drip pan.
 
Thank you for replying. How can I find it if my sink ports to the shower Sump?
 
Try boiling water works on all our drains including showers with sumps. Need a few application. When done run cold water. If it slows repeat hot water
 
Ok. Let’s solve this now. Most boats have a loop in the drain hose like the j pipe in a house. You don’t need it cause there is no sewage stink coming up, so cut the loop, let it go out the side, drain faster.
 
C3B49088-512B-4AB9-94F5-014A419D1003_sRGB.JPG

I believe the loop is there to prevent water from coming into the boat in heavy seas when underway. I would try bilge cleaner instead of a snake which may damage the drain line. Hot water is a good idea too.
 
Peter Z. said:
The galley sink in my 2009 SD 330 drains very, very slowly. Is it OK to use a land-based chemical like Drano?
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Try using a garden hose with trigger nozzle. Remove strainer, hold nozzle in drain. Place a towel over your hand and nozzle to reduce blow back spray. Unlikely that the sink drains into sump, but if it does and clears, shop vac the gunk out of the sump box. While your are at it, hit the rest of the drains too. My shower and galley sink drains slow at least twice a year and this has always worked.
 
sbw1 said:
View attachment 99132
I believe the loop is there to prevent water from coming into the boat in heavy seas when underway. I would try bilge cleaner instead of a snake which may damage the drain line. Hot water is a good idea too.
Click to expand...
prolly right, but if seas so heavy as to do that, i not leaving the slip.
 
I've used Roto Rooter drain cleaner in my showers twice in the last five years and have had no float switch problems...just sayin'.

I do flush it well afterwards.
 
If it does drain out the side, just replace the hose. Cheap fix and it probably needs replacing anyways.

If it has a loop, put the loop back in it. It's there to keep the outside water from rushing up into the cabin in heavy seas or an emergency situation.
 
carterchapman said:
I've used Roto Rooter drain cleaner in my showers twice in the last five years and have had no float switch problems...just sayin'.

I do flush it well afterwards.
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I might try the Roto Rooter stuff. I went through 5 float switches before I figured out what was happening.:(:(
 
bahamabreisus said:
I might try the Roto Rooter stuff. I went through 5 float switches before I figured out what was happening.:(:(
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I have a door in the top of my sump and a FW hose in my bilge, so it’s easy to clean and flush my sump.
 
Last edited:
Pirate Lady said:
prolly right, but if seas so heavy as to do that, i not leaving the slip.
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I would keep loop in. It also prevents the chance of carbon monoxide from coming into your cabin. Never know if your slip mate or somebody on the hook runs the genny at night while you're sleeping...
 
Pirate Lady said:
prolly right, but if seas so heavy as to do that, i not leaving the slip.
Click to expand...
Never got a bad weather forecast, huh?

Don’t know about you, but I don’t think you should suggest someone else only plan for the good.
 
I think all of our sinks drain slowly. I think the hose is corrugated plastic which can't drain very well. I could have that wrong though. It if is corrugated, I think you could replace it with a smooth walled hose, with a loop, and it might improve it.
 
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