As such, you’ll need to match the pump’s output tubing to the denitrator’s smaller intake fitting. The diagram shows the “step-down” method used to accomplish this. Start with a piece of tubing that will fit over your pump’s output nozzle.
Next, insert a next size smaller diameter tubing into that, repeating the process until you have achieved a good fit at both ends of the line, at the pump output and the denitrator’s input. Secure each connection with a nylon tie-wrap or stainless-steel hose clamp.
I always drop the short lengths of tubing into boiling water 1st to soften them up. This makes inserting them so much easier. Once done, run cold water back over the assembly and this will “tighten” them all up. You are done!
There is NO ADJUSTMENT TO THE PUMP’S OUTPUT VELOCITY AT THIS TIME! The pump will operate at it’s rated output velocity in this installation!!!
Now we get to the heart of the entire project! As important as the choice of bio media is, the quality and accuracy of the valve that controls your drip rate will make or break this project!
Many, many folks have commented on restricting the output on their pumps. Somewhere, someone once mumbled that restricting a pump in any way would ruin it. URBAN MYTH! While it IS true that you should never, EVER restrict the INTAKE of any pump, there is absolutely NO harm done to any pump when you throttle it at the OUTPUT side! The impellor will continue to spin at it’s rated volume without any detrimental impact.
Having said that, let’s look at how this should work.
