Quote Originally Posted by richie00boy View Post
I've got a car screenwash tank with inbuilt pump. I planned to run it at 6V or so as it's not meant to run continuously, and running at 12V I think the flow will be way more than needed.

Only problem is how to attach a return connector to the top, and making a wooden crade for it. If it proves too difficult (maybe it's polypropylene which won't glue) I might try using a small car header tank and I've got a small brushless pump which will be fine for continuous duty.
Hi,
in fact i did just the same at the beginning. It will heat and eventually break. I had a Mercedes screenwash water tank and VDO brand pump. I fixed a PC cooler fan on the pump and run it at 6v. One day it broke. It heated a lot and made a lot of noise.

Its up to you but if you go to a local pet store for 20eur you can have a perfect 1000lph pump, if you dont want spending 32euro on the ebay one/3000lph/.