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Old 07-31-2012, 11:50 PM   #1
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Default CPVC Manifold - Where did I go wrong?

So I tried my hand at building a CPVC manifold, since I was tired of a floating braid and mangling it during stirring.

I gave this manifold a test run awhile ago, and it failed. When I first opened up the valve, a ton of grain came out very quickly. Then just stuck immediately afterwards. I ended up attaching a bike pump to the valve/hose to force the grain back out of the manifold. I finally got a very slow run, but with tons of grain chunks. I put a paint strainer bag in the kettle to help filter the grain even further. I had to repeat the process for the (batch) sparge. My crush is done at the lhbs, and looks like a good crush to me (though I lack experience). I'm pretty sure it wasn't over crushed, at least not significantly so.

The manifold did not fall apart during the whole process. What did I do wrong? Too many slits? Slits too big? The slits are cut with a hacksaw.





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Old 08-01-2012, 12:35 AM   #2
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Slits look like they are too big. If you don't want to rebuild maybe get some mesh and wrap it around the holes.

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Old 08-01-2012, 01:22 AM   #3
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Quote:
Originally Posted by tally350z View Post
Slits look like they are too big. If you don't want to rebuild maybe get some mesh and wrap it around the holes.
How thin do you think they should be? The slots are thinner than a dime.
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Old 08-01-2012, 01:40 AM   #4
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Slits look fine you may need more pipe with slits in it. May have to many bends.

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Old 08-01-2012, 01:46 AM   #6
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I drilled holes in mine didnt use slits. It works great

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Old 08-01-2012, 01:51 AM   #7
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I agree with opening the valve slowly at first. The after the grain bed sets, you can open it all the way.
The slits look fine.
Bull

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Old 08-01-2012, 02:02 AM   #8
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I built a very similar one, except I used an 1/8" drill bit, and it works great. I know a hacksaw cut works well. Is it possible that the outlet tube was the issue? Loose fitting, or came undone?

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Old 08-01-2012, 02:00 PM   #9
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I opened the valve slowly, but slow is subjective. It definitely clogged long before I could ever open the valve all the way. How slow are you guys talking about?

I'm very reluctant to try out this manifold again without any changes...

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Old 08-01-2012, 02:07 PM   #10
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How is the final connection made to the bulkhead? Any chance there was a gap?

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