For all your heating and cooling needs, call or contact us today! Sunday afternoon and the septic tank was backing up.. Do you have problem drains? or do you just want to check the condition of your drain? then our colour video unit is just what you need! In other words, the model ‘number’ is not always an indication of heating output, although it occasionally is (confusing we know) to make sizing clearer, we have included a separate column called ‘heating output.