75mm (3x2x3) Round to Rectangular Downspout Adapter

thingiverse

My house was built in the 70's and has custom gutters and some flat roofs which all use 3" round downspouts. I went to the local building supply stores to locate replacement 3" downspouts and elbows but found that they have mostly been replaced with 2x3 rectangular parts. No problem, I would just get some round to rectangular adapters and switch to the new style. I could not find anything locally and on line most of the parts were adapters to go from rectangular to 4" drainpipe. I finally located some 3x3x2 adapters online but they were asking $30 -$40 each for them. I therefore decided to make my own and will eventually print them in ABS. My test models are printed in PLA (under $1 each) so I will put a few in and see how they weather the winter. During my final test print I ran out of blue filament so I had to switch in some grey. The round part fits my existing 3" galvanized easily, which I want because the current parts are not necessarily in great shape (I did not want to fight with a tight fit.) The rectangular part fits snugly onto my rectangular vinyl downspouts. This allows me to fit the part onto the vinyl downspout and then lift the pipe into place over the part in the roof easily. Note: I have an updated design that includes the scalloped edges of the vinyl downspouts and may fit a little better, depending on the downspout deign. https://www.thingiverse.com/thing:3956878