Brass Unions

[BimmerRacer]

Do I need to put anything between two halves or do I just crank it down to seal it?

[SewerRatz]

Just tighten them down the ground face of the union will make the seal.

[BimmerRacer]

Thanks Ron!

[jadnashua]

A couple of things...make sure the pipes are aligned when you tighten things up. And, especially if you overtighten, you may find you create a ridge on the sealing surfaces, so if you need to tak it apart, it becomes more difficult to seal unless you get it aligned perfectly.

[hj]

I usually use pipe joint compound on the faces and the threads of the union nut to give some lubrication to the process.

[shacko]

Do to the fact that most fittings are made off planet, I also use a little pipe compound on the face, your choice.

[BimmerRacer]

Thanks for the tips gents