I have a gas fired hot water boiler system. When the circulation pump comes on I can hear the water running through the pipes. I sounds like there is a lot of air in the lines. I have tried to blead out the air at the reqeristers but nothing comes out . When I have done this before at least water woud come out of the air blead but know nothing. I seams that there is no pressure in the lines. What can I do?

You likely need to look at the make up water supply to the boiler and also look for possible leaks. If you have an Amtrol makeup it may just need re pressurized to 10psi.

Look at you boiler there should be a temp pressure gage on it. If the water is cold you shoud have 10 to 12 pressure. If it is hot and running you should be around 24 or so with a temp of 180 degrees. If you do not have the right pressure you self fill valve is probably bad and you will need to add water manually to it till you get it fixed