I'm doing my first all grain batch tomorrow and i have a questions about batch sparging.
after the grain has set for 75min with the first batch of water, i'm going to recirculate and add another batch of water to the tun. Do i let the sparge water step the grains for another 75minutes? Or do i automatically draw the water off of the wort.
My last recipe called for a temperature of 153 degrees for 60 minutes and 170 degrees for 10 minutes. Then drain the wort then do the sparge. I use Brewheads.com - Batch Sparge Calculator to get the addition temperatures and amounts.
You have to add water warmer than the target temperature to end up at the target.
Add hot water to your mash tun and close the top to preheat it.
Good luck, It is a lot of fun.
Pay attention to what you are doing and don't have too many homebrews or your next post will be another "did I ruin it"
after your first run off pour in your sparge water, open your valve and collect wort into a container until the wort runs clear, pour the contents of your container back into the MLT and continue to drain your mlt into your kettle.