I don't understand. When a zone calls for heat you are saying that the boiler opens the zone valve, but the pump doesn't turn on?

If so, you could get a 24volt relay and attach it to the boiler output, and then run 120 out of the relay to the pump.

Sorry for not being clear. The boiler has 1 pump. If either zone calls for heat, this pump turns on and the zone valve opens.

1 zone has a second pump also. I want to start the second pump as well.

My pump controller only works via thermostat. This pump controller is separate from the boiler controller. I guess part of my question is do they make a controller that switches the pump on when 24v is present, as opposed to a thermostat which is just a switch contact.

that is a really odd configuration.it seems like you could wire this yourself using another 24 volt relay. But take a look at this website pdf... http://www.taco-hvac.com/en/products/Zone+Controls/track_file.html?file_to_download_id=8010

Here is a link that might be useful: taco controls

This post was edited by audiomixer on Sun, Feb 17, 13 at 2:39

"1 zone has a second pump also. I want to start the second pump as well. "

The 24 volt signal that actuates this zone can also be used to actuate a relay whose output can turn on this pump. If the pump is 120V ,then all you need is a relay and some wiring. Seems like an easy DIY