You don't want to use the urn to heat the syrup from cold or room temperature or you are likely to overheat whats in contact with the element and get some niter. We usually go from the finisher through the filter press and into the urn to bottle when we are working in-season. Occasionally, we may have to turn the urn on for a minute or two to keep above 180 but haven't had any niter issues doing that. Urns work good as a bottler but not to heat with. Find another way to heat from cold or room temperature. When we bottle from our 5 gallon jugs in the off-season, we use the finisher which has a valve right on it and bottle directly from that and don't bother with the urn.