Started the Herms build today.

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Re: Started the Herms build today.

Postby Pakman » Sun Apr 10, 2016 11:28

First use in anger failed! Although I drained and recycled a jugfull before starting the HERMS, the small filter clogged quite quickly. Having cleared it out I could then not restart it due to not having a bleed point installed to remove the air from the closed system to allow the wort to reach the pump. Finished the mash normally and then once the boil was on, I refilled the mash tun with all grain still present and experimented with the rig for a while. :hmm:
Required modifications have been noted and will be made before the next brew.
Incidentally, it did work of sorts for a while during the mash and the result was a higher SG than expected. Should have been 1048 and came out at 1049. Sorry no pictures :whistle: as I became engrossed with trial and modifications.
Graham

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Re: Started the Herms build today.

Postby pittsy » Sun Apr 10, 2016 19:18

My filter would always block until i started waiting a good 10 mins before turning the pump on and by reducing the flow too .
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Re: Started the Herms build today.

Postby ockelford » Mon Apr 11, 2016 10:23

I don't know if I've missed something here - but why bother with a filter? The mash bed is the filter. I use a £15 solar type pump and its never clogged at all.

As above, I leave the mash for 5-10 minutes after doughing in and then start the pump slowly. First runnings through the pump are a little rough and cloudy, a few small bits of husk go through, but they're filtered by the manifold, so they can't be big enough to damage the pump and all pass through, back to the top of the mash. By 30 minutes, the finer particles are all but gone, and and after 60-90minutes its crystal clear.

Is the filter an unnecessary feature, or does it serve another function?

R
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Re: Started the Herms build today.

Postby Pakman » Tue Apr 12, 2016 20:19

ockelford wrote:asked " I don't know if I've missed something here - but why bother with a filter? The mash bed is the filter. I use a £15 solar type pump and its never clogged at all."


As I'm returning the wort into the mash tun via a copper manifold I do not want all the 1mm holes in the manifold to block up. I thought it would be simpler to use the sparging manifold ifor the HERMS. Possibly not :hmm:

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Re: Started the Herms build today.

Postby PhatFil » Tue Apr 12, 2016 20:53

a grain bag is a simple large particulate filter that wont clog ;) and it makes removing the spent grain from the tun a doddle too..
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Re: Started the Herms build today.

Postby ockelford » Wed Apr 13, 2016 09:22

I personally use a plastic plate floating on the top, dropping a silicon hose. No splashing or grain bed disturbance and i fly sparge, so it works fine for me, but i agree, a simple return manifold is easier in a way. I once made an inverted t shaped return manifold, which had elbows which pointed up, to make fly sparging into the head of water over the grain bed easier... If you can imagine that...
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