water pump adapters

I made fittings for a common water pump you can buy on ebay, aliexpress, or amazon. I have tested these fittings and they screw on nicely if you print them at fine quality. I recommend using an o-ring if you have one to obtain a nice seal. The thread is M20-2mm. The fittings are meant to be used with 0.5 inch tubing (the fitting OD is 0.375"). These sealed well for me.