I just bought a pump and was planning on trying to use it to recirculate the mash through a copper coil heat exchanger in the hot water tun for the first time. I was planning on draining the runnings a few times first before pushing the mash through the pump. I imagine some grains will still get pushed through. Do you have to worry about damaging the pump from grain impingement?
Thanks for the replies. I have a typical false bottom. When i sparge and drain to the boil kettle I typically run a pint or two and throw back in to the mash. After that the runnings are pretty clear. I'll do the same before hooking up to the pump. I haven't actually used the system yet. I was just thinking ahead.