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Home Brew Forums > Home Brewing Beer > Electric Brewing > Hose sizing
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Old 12-01-2012, 05:45 PM   #1
malador
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Default Hose sizing

Will a March AC-5B-MD pump have trouble using 1/2'' I.d. lines? I ask because I already have have 1/2" lines for my set-up, and have a AC-5B on the way. I know smaller lines will reduce performance, but i'm worried about priming and what-not.

http://www.marchpump.com/ac-5b-md/

1/2" outlet

1" inlet

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Old 12-01-2012, 06:33 PM   #2
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There is a thread here someplace where the march dude doesnt recommend downsizing the line. It will work but you'll be starving that pump. I have a brand new one sitting on the shelf and then purchased 2 809's when i realized switching everything over to 1" ( tc's on evrything) is a project I'm not going to do on my keggles, the 809 is plenty for those batches. I will use it when I upgrade to larger vessels.

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Old 12-01-2012, 06:51 PM   #3
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I knew that was probably the case, but i was hoping it wasn't. I guess it's time upgrade some lines then. In the mean time, i'll see if can run the pump at half speed and see that works ok.

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Old 12-01-2012, 09:07 PM   #4
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It won't be too much an issue. Just make sure your inlet is not restricted. I use a lg 5 series pump, basically the same size as your march ( 1" inlet 1/2" outlet) and I don't have an issue. Just don't restrict it right at the inlet with a reducing bushing. I used a 1" to 3/4" elbow and then a 3/4 to 1/2" adapter with a camlock.

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Old 12-01-2012, 09:35 PM   #5
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Quote:
Originally Posted by JRems View Post
It won't be too much an issue. Just make sure your inlet is not restricted. I use a lg 5 series pump, basically the same size as your march ( 1" inlet 1/2" outlet) and I don't have an issue. Just don't restrict it right at the inlet with a reducing bushing. I used a 1" to 3/4" elbow and then a 3/4 to 1/2" adapter with a camlock.
Do you remember where you got the 3/4" to 1" elbow? They are not stocked at the local hardware store, and i'm having trouble finding them online. *edit* in 1" male to 3/4'" female
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Old 12-02-2012, 04:23 AM   #6
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I used a brass one. Stainless might not be able to find. My grandfather was a plumber so I looked though some buckets of old fittings. Maybe a good plumbing supply would have?

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Old 12-02-2012, 07:45 AM   #7
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http://www.homebrewtalk.com/f11/new-...ump-240026/#10
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