Rain Water diverter (Regensammler) for DN75 PVC downpipe

Looking for an efficient rain water diverter on a moderately busy 75mm (DN75) downpipe at my house I found that the few models that came close to my expectations were in the price range of 40 to 70 Euros. So I decided to remix the DN100 model I made earlier for a smaller diameter.

Due to surface tension, almost all water in a downpipe runs along the walls. An effective diverter must collect it right there. The center is left open, using almost the whole diameter, so that any dirt and leaves from the roof can fall through without clogging the drain.

In heavy rain situations the downpipe must handle lots of throughput. That is why I chose a DN50 outlet. Only a few commercially available diverters feature more than 1 inch outlets. 

The diverter has been tested successfully and is working with high efficiency.

I strongly recommend to print this in PETG or similar durable material for strength. I also have constructed a “support” base that helps printing the whole model at a 30° angle. This eliminates any need for other support. Moreover the angled print creates a layer structure that is diagonally aligned to the mechanical load vectors and therefor improves general robustness. 

For optimum printing speed I recommend to set the parameters for the base (only!!) to 1 bottom layer, 1 wall, 2 top layers and lightning infill.

For the diverter model itself I recommend at least 3 wall layers, 20% infill and at least 0.6mm of top and bottom layers. The model in the pictures has been printed in 0,15mm layers of PETG.base