I'm looking for some kind of floor plug/gasket/grommet/valve/drain

[Native]

Originally Posted by musigenesis

Decided to go with these little MNPT drain cocks: https://www.grainger.com/product/PAR...in-Cock-21VL69

My plan is to weld a nut on the underside and to run these through that and a hole in the 14 ga sheet, so that the drain is flush with the bottom of the floor. I explained what I was trying to do to the tech person at Grainger and they said this was pretty much the only way to do it.

As I was reading this thread, I was going to suggest this method, but I see you have already come upon it.

[Dirtdoctor]

Go to a boat sports place and buy two boat plugs.

[kidharris]

Originally Posted by musigenesis

Decided to go with these little MNPT drain cocks: https://www.grainger.com/product/PAR...in-Cock-21VL69

My plan is to weld a nut on the underside and to run these through that and a hole in the 14 ga sheet, so that the drain is flush with the bottom of the floor. I explained what I was trying to do to the tech person at Grainger and they said this was pretty much the only way to do it.

Could ypu get away with just a hole with a wire screen epoxied over it to keep out bugs?


Why do you need to shut it off with a valve/bolt/plug?

[Mudhutwarrior]

Try refrigerated trailer kazoo drains. Chassis king has them.




just weld on a pipe nipple the right OD and slip these on and clamp them. They keep bugs and critters out and drain all water.

[musigenesis]

Originally Posted by musigenesis

Decided to go with these little MNPT drain cocks: https://www.grainger.com/product/PAR...in-Cock-21VL69

My plan is to weld a nut on the underside and to run these through that and a hole in the 14 ga sheet, so that the drain is flush with the bottom of the floor. I explained what I was trying to do to the tech person at Grainger and they said this was pretty much the only way to do it.

Well, this is annoying. Turns out the threaded part of this drain cock is 13/32 fine ( -18 ), something for which nuts are non-existent, as far as I can tell. I think I need this thing: https://www.grainger.com/product/PAR...in-Cock-21VL71, although it's bigger than I want it to be, but it uses a 5/8 nut.

[Mudhutwarrior]

Originally Posted by musigenesis

Well, this is annoying. Turns out the threaded part of this drain cock is 13/32 fine ( -18 ), something for which nuts are non-existent, as far as I can tell. I think I need this thing: https://www.grainger.com/product/PAR...in-Cock-21VL71, although it's bigger than I want it to be, but it uses a 5/8 nut.

First mistake is trusting grainger for advice. Better luck asking autozone about aircraft engines.



Draincocks get plugged up all the time and you need to remember to open and close them.



Look what I posted above. They are used on reefer trailers and containers.
Zero maintenance. Never mind cheaper.