my hydron module 410HO50 is up and running, heating the house nicely. I was asked the other day what my field pressures were, looked on the lines and there are no pressure gages, is this something to be concerned about? My loop consits of 50' of line to a manifold that does 4 500' loops, two pumps run the system, any idea of what my pressures should be? loop is 6' down in the ground.