Pump bypassing the bin

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Pump bypassing the bin

Unread postby maiko » Mon Feb 18, 2019 10:27 am

Hi all,

During the mashing, it looks like the flow is not going thru the bin, but beside it. What is wrong here?



Thank you.
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Re: Pump bypassing the bin

Unread postby fra77mo » Mon Feb 18, 2019 8:12 pm

Did you fit properly on the bottom the malt pipe?


Inviato dal mio iPhone utilizzando Tapatalk
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Re: Pump bypassing the bin

Unread postby Sladek789 » Mon Feb 18, 2019 8:26 pm

I had that once too. The malt in the malt tube is simply too compact. The flow is too restricted to get through the malt tube so it is going out elsewhere.
In that case, I stopped the pumps, open the top disk, stirred well to free the malt mix, then recovered and restarted the mash. It helped but was not great as my malt was milled too fine during that brew.

So in short, mill coarser next time (1.2mm or more) and mix well. It should solve it.
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Re: Pump bypassing the bin

Unread postby IPA » Tue Feb 19, 2019 8:32 am

Sladek789 wrote:I had that once too. The malt in the malt tube is simply too compact. The flow is too restricted to get through the malt tube so it is going out elsewhere.
In that case, I stopped the pumps, open the top disk, stirred well to free the malt mix, then recovered and restarted the mash. It helped but was not great as my malt was milled too fine during that brew.

So in short, mill coarser next time (1.2mm or more) and mix well. It should solve it.


Spot on ! Plus check the seal is properly fitted on the bottom of the malt tube. It could also be that the malt tube is not aligned correctly and is sitting on nut that holds the heating element in place. This happened to me once just recentlly for the first time and I have been brewing with a BM for over eight years. If the seal is correctly fitted and the tube is fully tightened correctly in place the pump(s) are not powerfull enough to to force the wort out from anywhere other than through the grain in the tube.

Edit. Just watched the video and I am certain the it's the bottom seal or the tube is sitting on the element nut.
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Re: Pump bypassing the bin

Unread postby Luis Coentrao » Sat Feb 23, 2019 10:15 pm

It just happened to me the same yesterday at the end of the mash (at 78 Celcius). Did not stired the grain during the mash. Why did only happened at 78C?
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Re: Pump bypassing the bin

Unread postby mashy » Sun Feb 24, 2019 8:37 am

Did you stir the mash when you put it in?
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Re: Pump bypassing the bin

Unread postby Luis Coentrao » Sun Feb 24, 2019 3:34 pm

Yes. The mash went as usual until it reached 78C.
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Re: Pump bypassing the bin

Unread postby mashy » Mon Feb 25, 2019 8:06 am

do you have a bac disk?
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Re: Pump bypassing the bin

Unread postby Luis Coentrao » Mon Feb 25, 2019 9:32 am

Sorry, what is a back disk?
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Re: Pump bypassing the bin

Unread postby mashy » Mon Feb 25, 2019 9:51 am

Let's try that differently :D Are you using the standard BM top Filter plate
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Re: Pump bypassing the bin

Unread postby IPA » Tue Feb 26, 2019 7:38 am

mashy wrote:do you have a bac disk?


It's clearly visible in the video
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Re: Pump bypassing the bin

Unread postby mashy » Tue Feb 26, 2019 8:17 am

@Luis
Like the one in the video or are you using the BM top plate.
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Re: Pump bypassing the bin

Unread postby Luis Coentrao » Tue Feb 26, 2019 12:49 pm

Thanks for the reply.
I'm using the LODO kit from speidel. But it also happened with the standard one.
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Re: Pump bypassing the bin

Unread postby mashy » Tue Feb 26, 2019 11:52 pm

I would check the lower seal and make sure the malt tube is screwed down tight.
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Re: Pump bypassing the bin

Unread postby mashy » Tue Feb 26, 2019 11:54 pm

Hmmm. Thinking.

78c is very close to the temp the pump cuts out. Are you sure you ain't confusing this with boiling?
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