BCM Community

Does anyone know the propper way to install airline antifreeze.

Spray it on the wings and control surfaces before takeoff?

John

No John I was referring to air brake airline antifreeze.

Bleed down the air pressure to zero, then disconnect the output fitting from the compressor and pour the antifreeze in.  You can accomplish the same thing with an air/water separator, like a Bendix AD-9.  I've been in as cold as -20F and not had an air pressure problem. If you don't have any moisture in the air system, there isn't any water to freeze.  Good Luck, TomC

But, don't put antifreeze in ahead of an air drier!

You will turn the desiccant material into mud and plug it all up.

I like to install a male air fitting into the wet tank drain with a suitable quarter turn valve.

You can air up the coach from there, as well as make up a rig for pumping airline antifreeze into the tank.

Get an outboard motor fuel line, you want the primer bulb and the lines, recover the ends for outboard use, and install a female air fitting in the output end from the primer bulb. The other end goes into the bottle of antifreeze, and you pump it into your wet tank. Let the air pressure out of the wet tank first...

It will quickly migrate through the system, as the coach is run.

For continental US purposes, perhaps put a quart or so in and call it a winter. Open drain in the spring.

happy coaching!
buswarrior