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Old 08-23-2010, 12:34 AM   #1
Twang
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Default Ball valve question - Little Giant Pump

I am in the process of building a 1 tier setup with 2 kettles and converted cooler. I will be using 1 pump and quick disconnects to transfer the liquids. After reading through the forum I am leaning towards purchasing a Little Giant 3-MD-HC pump for my setup. This pump has a 3/4" intake and 1/2" discharge.

My question:
What size hoses/ball valves/connections should I use on each vessel? All 3/4 inch and put a 1/2" to 3/4" adapter on the pump discharge?

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Old 08-23-2010, 12:36 AM   #2
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I'm doing just the opposite, I've seen many on here do the same.

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Old 08-23-2010, 01:23 AM   #3
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I was thinking about this too. Then I found:
http://www.plumbersurplus.com/Prod/L.../1006?RefID=CJ which has 1/2" intake/outtake

and you can pretty much follow http://www.homebrewtalk.com/wiki/index.php/March_Pump
for what to connect where.

(I have not actually bought this pump yet, but plan on doing so soon)

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Old 08-23-2010, 12:14 PM   #4
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Quote:
Originally Posted by gpogo View Post
I was thinking about this too. Then I found:
http://www.plumbersurplus.com/Prod/L.../1006?RefID=CJ which has 1/2" intake/outtake

and you can pretty much follow http://www.homebrewtalk.com/wiki/index.php/March_Pump
for what to connect where.

(I have not actually bought this pump yet, but plan on doing so soon)
If you're going to get the 3-MD-MT-HC then you might as well just get a March or Chugger pump, the 3-MD-HC is 1/12HP, the MT-HC is 1/25HP.
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And I'd like to see my 1.080 beers ready from grain to glass in a week, and served to me by red-headed twin penthouse pets wearing garter belts and fishnet stockings, with Irish accents, calling me "master luv gun," but we can't always get what we want can we? :)
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Old 08-23-2010, 03:57 PM   #5
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Originally Posted by wyzazz View Post
I'm doing just the opposite, I've seen many on here do the same.
I thought I read somewhere that it is better to restrict the outflow and not the inflow... any truth to this?

Also, if you use all 1/2" hoses and fittings, will that decrease the pumps performance vs. using all 3/4"?
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Old 08-23-2010, 04:13 PM   #6
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Yes, you can restrict the outlet, not the intake. I essentially did what you describe but with triclovers. My intake is a full 1" and my output is ~7/8". The 3-MD-HC can handle the higher volume and so you can go a little bigger with the output. I'm not sure 1/2" tubing is going to decrease its performance, as the output IS 1/2".....but with such a high flow rate you would definitely do better with bigger tubing.

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Old 08-23-2010, 06:46 PM   #7
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Quote:
Originally Posted by ScubaSteve View Post
Yes, you can restrict the outlet, not the intake. I essentially did what you describe but with triclovers. My intake is a full 1" and my output is ~7/8". The 3-MD-HC can handle the higher volume and so you can go a little bigger with the output. I'm not sure 1/2" tubing is going to decrease its performance, as the output IS 1/2".....but with such a high flow rate you would definitely do better with bigger tubing.
So you have a 3/4" to 1" adapter on the pump intake and a 1/2" to 7/8" adapter on the pump output?
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Old 08-23-2010, 09:44 PM   #8
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Kinda. I have a 3/4" MPT x 1.5" Triclover screwed into the intake. That is then clamped to a 1" Barb x 1.5" Triclover. Then 1" PEX is slid over that barb.

On the outlet, it's a 1/2" FPT x 1.5" Triclover married up with a 3/4" Barb x 1.5" Triclover.

1" Triclover pipe has an ID of ~7/8"; 1.5" Triclover pipe has an ID of ~1.3".

Confusing, I know Just understand that my pipes are bigger than the pump is designed for, and the flow rate should make up for it.

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Old 08-23-2010, 10:13 PM   #9
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I have the TE-5.5-MD-HC and this has 1" inlet and 3/4" outlet. I plan to step it down to take 1/2" input and 1/2" output with the valve on the outlet side, as recommended. There is no point for me to try to do 3/4" or 1" inlet as I will be pumping through CFC or recirculating the mash and I can't work a hard-plumbed system into my current setup.

I have read of others doing this as well with similar pumps.

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Old 08-23-2010, 10:14 PM   #10
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Quote:
Originally Posted by ScubaSteve View Post
Kinda. I have a 3/4" MPT x 1.5" Triclover screwed into the intake. That is then clamped to a 1" Barb x 1.5" Triclover. Then 1" PEX is slid over that barb.

On the outlet, it's a 1/2" FPT x 1.5" Triclover married up with a 3/4" Barb x 1.5" Triclover.

1" Triclover pipe has an ID of ~7/8"; 1.5" Triclover pipe has an ID of ~1.3".

Confusing, I know Just understand that my pipes are bigger than the pump is designed for, and the flow rate should make up for it.
Can you get PEX for boiling temps? That sounds like a great option if available.
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