1 A ratio variable, has all the properties of an interval variable, and also has a clear definition of 0.0. 2  When the variable equals 0.0, there is none of that variable. 3  Variables like height, weight, enzyme activity are ratio variables.4  Temperature, expressed in F or C, is not a ratio variable. A ordinal variable, is one where the order matters but not the difference between values. 2  For example, you might ask patients to express the amount of pain they are feeling on a scale of 1 to 10. 3  A score of 7 means more pain that a score of 5, and that is more than a score of 3.
Also be sure a hole has not been punched in the bellows as this will cause a vacuum leak. The second thing that causes breaker to blow is simply an old worn out electric pump motor, especially in salt water applications. The third cause is that the holding tank is full and the vent line is plugged.
These tanks do over the years become clogged with silt and sediment and require attention, this can be due to a lack of dip pipes on the main tanks, the storm water from the property passing through the tank or the beams or slabs that cover the tank allowing soil and silt to be washed into the filter.eptic Tank Conversion To Treatment Plants. There are units that can be applied to an existing septic tank which will convert it into a Treatment Plant cleaning the waste sufficiently enough to be discharged into a water course.