Trap Drain

[Blitz]

What is the real pupose of installing a trap type drain for a head sink? I assume it helps keep any odors coming up through the drain. Any other benifits?

Anyone have any negatives? Assume a negative is that you'll need to winterize the trap.

 

[Benny17441]

The only benefit I can think of is to avoid having hairs and other solids sticking to your boats topsides below the discharge through-hull. In an open system odors should not be a problem. As far as winterizing the trap, not in Florida.

 

[Blitz]

Drain Routing

I also see that many of the newer boats in the shows try to make better use of their under counter space by having their drains exit at 90 degrees and loop down hugging the hull to the through hull. Makes sense to me - not sure of any negatives and this might be an easy upgrade for anyone changing out their lines due to age.

 

[Ron20324]

In Florida, the traps keep the Palmetto bugs out

 

[Ron20324]

,,,,drains exit at 90 degrees and loop down hugging the hull to the through hull. ...

If, using your picture, the drain hose went straight down to the drain, water would probably gush up due to rocking action.

 

[Blitz]

If, using your picture, the drain hose went straight down to the drain, water would probably gush up due to rocking action.

Mine is straight from the drain to the thru-hull valve currently, never had any issues with it gushing up - just a little gurgling.

 

[kloudie1]

If the sink drain is below the waterline, no trap is needed.. or wanted..
If the sink drains to the holding tank ya might want one to make sure odors are held at bay..

 

[Johnb]

In Holland and Germany all water must go to a tank, so it would serve a purpose there.

 

[All U Get]

That's probably best used to catch your wife's earings or diamond ring, otherwise its a gift to some mermaid.

All U Get

 

[Benny17441]

In Florida, the traps keep the Palmetto bugs out

I don't know the ones here in Tampa don't fit in the plumbing fixtures. If youd put a saddle on them you could probably ride them.

 

[kloudie1]

That is funny, Benny. Ours here in Louisiana would get that big if the mosquitoes didn't drain them !

 

[kloudie1]

You know the drill:
Big mosquito knocked me down in the cockpit yesterday as I sipped a good rum. His friend told him to drag me back into the bushes before eating me.. The original 'skeeter told him "NO! if we drag him there, the big mosquitoes will take him away."

 

[Ron20324]

That's probably best used to catch your wife's earings or diamond ring,...

Not to worry... he owns a boat, so cannot afford REAL gemstones

 

[Stu Jackson]

Trap? For what? Other than the obvious humorists!

 

[Chris Patterson]

The only reason for a trap is in home plumbing, to keep the sewer smells......in the sewer. That's why you have a 'stink pipe' that tee's off, (usually behind the wall where you can't see it), to, well, vent off them tacos from 48 hours ago..