One pipe steam system adding cast iron base

oopsplumber · January 2016

I understand I need to pipe it like a two pipe system. One supply and then a return connected to a wet return.

Two questions:

1. Do I need a steam trap?

2. I assume I need an air vent?

Dave0176 · January 2016

No steam trap needed, yes you need an air vent. You can also pipe the second pipe down a minimum of 5' then back up into the main, if you dont have a wet return. This creates a water seal and you won't get hammer.

oopsplumber · January 2016

At the end of the original run right after the main vent the main the pipe run drops vertical about 5 feet then returns back to the boiler.

I am going to cut a tee in on that vertical drop about 3 feet below the main and have the bullnose pick up my radiator about 15 feet away.

Does this sound like an acceptable plan?

Fred · January 2016

In that case, Where it is attached to that vertical drop, it has to be below the waterline.

oopsplumber · January 2016

Ok. Thanks

Last question:

Do I bring my supply in the top tapping on the rad or the bottom tapping opposite the return?

Eric_32 · January 2016

Supply in the top, return out the opposite bottom end of the cast iron base,

One pipe steam system adding cast iron base

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