hahnmeister
In Memoriam
Wow, where to begin. Seems I have been away too long..lol.
First, DONT USE PENDUCTORS. They are seen as a beneficial way to get 3-5x the flow from a nozzle, but this means a pressure rated pump (more watts), and more back-pressure. Taking this deduction simply doesnt return what you put in. When you look at the watts per gph standpoint, the low-pressure, low-wattage, high-flow method wins every time. Penductors and flow eductors are a waste. I can do the math if someone disagrees, but take my word for it, the Dart is a much better option. I have had people challenge me on it and after I do the calculations...its obvious...eductors are a waste of energy.
As for elbows, many pump mfg's suggest using one size larger than the pump's outlet. So a 1" outlet should have 1.25-1.5" piping, etc. If you run the head-loss calculator with this 'oversized' piping, the elbows result in minimal restriction and head loss. 90's arent as big a deal if you do this.
BTW, head-loss from restrictive piping is not due to friction or turbulence, etc...Its a simple conservation of energy principle (Bernoulli elaborates on this in his work, but the principle is based off his relationship with Newton). The basic idea is that as velocity increases, pressure decreases. Just thought it might benefit some of you down the road.
Oh, and for the closed loop, I would still move the intakes up to the top 6" of the tank. This will make for much easier cleaning of the intakes. In fact, I have an important consideration for you...depending on this...are you planning on using a canopy or open top?
First, DONT USE PENDUCTORS. They are seen as a beneficial way to get 3-5x the flow from a nozzle, but this means a pressure rated pump (more watts), and more back-pressure. Taking this deduction simply doesnt return what you put in. When you look at the watts per gph standpoint, the low-pressure, low-wattage, high-flow method wins every time. Penductors and flow eductors are a waste. I can do the math if someone disagrees, but take my word for it, the Dart is a much better option. I have had people challenge me on it and after I do the calculations...its obvious...eductors are a waste of energy.
As for elbows, many pump mfg's suggest using one size larger than the pump's outlet. So a 1" outlet should have 1.25-1.5" piping, etc. If you run the head-loss calculator with this 'oversized' piping, the elbows result in minimal restriction and head loss. 90's arent as big a deal if you do this.
BTW, head-loss from restrictive piping is not due to friction or turbulence, etc...Its a simple conservation of energy principle (Bernoulli elaborates on this in his work, but the principle is based off his relationship with Newton). The basic idea is that as velocity increases, pressure decreases. Just thought it might benefit some of you down the road.
Oh, and for the closed loop, I would still move the intakes up to the top 6" of the tank. This will make for much easier cleaning of the intakes. In fact, I have an important consideration for you...depending on this...are you planning on using a canopy or open top?
