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Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Effect of Pickup Tube on Pump?
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Old 04-25-2013, 09:54 PM   #1
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Default Effect of Pickup Tube on Pump?

I recently purchased this pickup tube since my bulkhead would otherwise leave about a gallon of wort behind:

http://www.bargainfittings.com/index...product_id=157

Upon inspection it's obvious that inner diameter of the pickup tube is significantly smaller than my 1/2" ball valve.

What effect will this have on my Chugger Pump? Will it make it work harder, potentially shortening its life?

I'm probably over-thinking this but wondered why the pickup tube is so much narrower and if this would potentially damage my pump.

I'll be whirlpooling, so not as concerned about hop debris/break material.

Also, what is the advantage of this over a basic 90 elbow that retains the larger internal diameter?

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Old 04-25-2013, 11:32 PM   #2
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I wouldn't worry about it damaging your pump, the magnetic drive pumps are pretty resilient.

Not sure about what advantage it has, maybe easier to clean?

-G

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Old 04-25-2013, 11:43 PM   #3
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I wouldn't worry about it potentially damaging your pump.

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Old 04-26-2013, 03:23 AM   #4
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Pumping near boiling liquids with a restriction on the suction side of the pump can cause cavitation meaning bubbles form and accumulate in the pump head losing prime. It's why we recommend 5/8" tubing on the dip tube. In a flat bottom pot there is NO reason to use a compression fitting based dip tube.

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Old 04-26-2013, 03:35 AM   #5
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Quote:
Originally Posted by NWMushroom View Post
I recently purchased this pickup tube since my bulkhead would otherwise leave about a gallon of wort behind:

http://www.bargainfittings.com/index...product_id=157

Upon inspection it's obvious that inner diameter of the pickup tube is significantly smaller than my 1/2" ball valve.

What effect will this have on my Chugger Pump? Will it make it work harder, potentially shortening its life?

I'm probably over-thinking this but wondered why the pickup tube is so much narrower and if this would potentially damage my pump.

I'll be whirlpooling, so not as concerned about hop debris/break material.

Also, what is the advantage of this over a basic 90 elbow that retains the larger internal diameter?
Good points. Everything outside the kettle is 1/2" and yet we have undersized pickup tubes. I don't think you are over thinking this issue at all. Thanks for bringing this up
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Old 04-26-2013, 03:41 AM   #6
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I had never even thought about this. Interesting. Especially since I just picked up a couple new narrow diptubes!

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Old 04-26-2013, 06:58 AM   #7
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Quote:
Originally Posted by Bobby_M View Post
In a flat bottom pot there is NO reason to use a compression fitting based dip tube.
Interesting. With the position of my ball valve I need something... Are you saying in flat bottomed kettles you recommend a basic 90 elbow... Or nothing at all? I'm trying to get away from tipping the kettle to get more wort in the fermenter.

In any case, I have a pickup tube now, just need to cut about 1/8" off it first so it fits properly... Just the smaller ID of the pickup tube got me thinking, is all!
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Old 04-26-2013, 07:04 AM   #8
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I think what he's saying is to use 5/8" tubing and no ferrule or crimp. Use two O rings instead to seal the connection.

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Old 04-26-2013, 04:31 PM   #9
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On a flat bottom pot, the most practical and economical dip tube is a simple threaded elbow. If you have a welded in coupling, it would be a street elbow and a 5/8" hose barb to reach down. That's $9 as opposed to $20+. The diptubes that use a compression fitting a a bent length of tubing are reasonable for a keg given how far they have to reach.

While I'm running a business and would love to sell everyone $20 diptubes, I'd rather everyone get exactly what they need without overspending.

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Old 04-27-2013, 02:54 AM   #10
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Quote:
Originally Posted by Bobby_M View Post
While I'm running a business and would love to sell everyone $20 diptubes, I'd rather everyone get exactly what they need without overspending.
Bobby, I placed an order with you about 3 hours ago. It was not because you were the cheapest or the only one who had what I wanted. I placed the order with you because of the above, and this is not the first time I have seen you give the right advice instead of what could make you the most money.
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