Brass Drain Plug

KYSEAN

Do you all just screw the drain plug in by itself or use Teflon tape, grease etc...?

Black_Diamond

I use pipe dope. Works better for the metal fitting and the NPT threads.

KYSEAN

Are you using pipe dope as a lubricant or sealant? I always thought the dope would be used for craft stored in water over winter. I ask only because my new boat uses a brass plug and previous boats used the rubber type plugs. I've got little knowledge of using the brass plugs. thanks, Sean

Black_Diamond

The pipe dope is the sealant. You don't need a lubricant with brass like you do with plastic. It stays flexible, so it's not a mess to deal with. Are you trailering or in the water?

KYSEAN

Trailering. I would most likely remove mine when it comes out of the water each time.

Black_Diamond

Probably not a big deal trailering. Pipe dope is quick, a small dab around the threads will do it.

KYSEAN

It would be OK for me to use nothing but the Brass plug then?

Black_Diamond

For just day type trips, should be fine. Just make sure it is in snug!

KYSEAN

Thanks. Hand tight and a 1/4 turn is what I've heard. Is that correct? Thanks again, Sean

Black_Diamond

Some info for you on this:Leakage path through NPT threads shown at red points. No matter how tight you make NPT threads, a leakage path still exists. It is the function of the sealant to block the path between the male and female thread.

 

You can go by NPT specifications, but that's probably over doing it as they are for installations to be static.  Those call for about 2 turns after snug.  If you have it 'tight' with a wrench, you are probably OK.  Remember these are tapered threads, and if you do not draw them together well enough, it will rapidly loosen.  Beware if you do decide to use teflon tape, the friction is greatly reduced and can allow you to over torque and damage threads.

KYSEAN

Good info to know. thanks so much. Sean

Capt_Steve

Excellent advice, you guys.