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Old 01-15-2011, 01:08 AM   #11
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I circulate the wort at a fairly high rate and laying the tubing on the surface didn't work out well for me as it created some channeling and disruption of the grain bed. It worked just fine when sparging as the flow rate was very slow. I circulate the wort as fast as possible during the mash.
I had the exact same issues with the plain tube lying on top of the grain bed. I stuck a simple CPVC 90 in there, and rotate it so that it points up away from the grain bed like your 45's do. That did the trick for me, and I get great efficiency now. Like you said, there's as many ways to do this as there are adventurous brewers. No one way will work for everyone.
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Old 01-17-2011, 08:09 AM   #12
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You're right - I did forget to say IMO - point taken.
I agree there are multiple ways to achieve the same result but IMO I can't see how there can be channeling if there is 2" water above the grain bed.

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Old 01-17-2011, 12:11 PM   #13
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You're right - I did forget to say IMO - point taken.
I agree there are multiple ways to achieve the same result but IMO I can't see how there can be channeling if there is 2" water above the grain bed.
IMO, channeling is always a possibility regardless of how much water is above the grain bed, and particularly when circulating at a high flow rate using a pump. Channeling is much less likely when just sparging slowly. I built the return manifold specifically for circulating with a pump. It soon dawned on me that the same manifold could be used for sparging. I simply move the hose connection from the pump to the elevated HLT and I'm off to the races.
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Old 01-17-2011, 12:50 PM   #14
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How fast do you guys fly sparge to have that much flow? I have my valves set so I fly sparge over about 45 minutes.

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Old 01-17-2011, 02:23 PM   #15
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How fast do you guys fly sparge to have that much flow? I have my valves set so I fly sparge over about 45 minutes.
I fly sparge very slowly, but I circulate my RIMS as fast as possible.
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Old 01-18-2011, 02:38 PM   #16
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Here's mine ready to get to work, similar design:

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Old 01-18-2011, 02:48 PM   #17
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I fly sparge very slowly, but I circulate my RIMS as fast as possible.
I thought this whole discussion was about sparge devices not recirculation rates?
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Old 01-18-2011, 02:59 PM   #18
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How fast do you guys fly sparge to have that much flow? I have my valves set so I fly sparge over about 45 minutes.
Apparently both.
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Old 01-19-2011, 12:00 AM   #19
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so there are a lot of questions about just using a piece of silicone tubing??? building a sparge type device will not be that big of a deal but lying a piece of silicone tubing on top of the grain bed will be a lot easier. i would still like to see what others are doing...

as far as recirculation rates, i have no idea. this is my first system where i will have that capability. i just figured pretty slow? is there a certain speed (qts per min) that i should be searching for?

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Old 01-19-2011, 12:31 AM   #20
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so there are a lot of questions about just using a piece of silicone tubing??? building a sparge type device will not be that big of a deal but lying a piece of silicone tubing on top of the grain bed will be a lot easier. i would still like to see what others are doing...

as far as recirculation rates, i have no idea. this is my first system where i will have that capability. i just figured pretty slow? is there a certain speed (qts per min) that i should be searching for?
The general consensus appears to be that it makes no difference whatsoever how you get the sparge water into your mash tun.

IMO, the circulation rate should be as fast as possible. IME, this shortens the temperature ramp up times as you can apply more heat without scorching the wort than you can at lower rates. IMO, it also helps to maintain a more stable and uniform grain bed temperature. Just my take on it. I'm certain others will disagree, YMMV, blah, blah, blah.
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