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Old 04-06-2007, 04:27 PM   #1
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Default SST braid too low flow for HERMS?

Hi all - my first dry (well, wet) run on my homemade HERMS setup made it abundantly clear that the SST braid in my 10-gal MLT just doesn't provide enough flow to feed the March pump.



The pump is a the same level as the MLT outlet, and it's only facing about 2' of head elevation (through ~35' of 1/2 copper and back into the top of the MLT.

Anyone else have similar experiences with a cooler MLT not providing enough outlet flow for the pump? I'm wondering if a slotted copper ring would get things moving faster.

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Old 04-06-2007, 04:33 PM   #2
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I haven't had any problems with my braid, it flows pretty good.

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Old 04-06-2007, 04:37 PM   #3
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I suspect it's because you're cramming so much braid into your fittings, restricting flow there. My guess is a smaller braid or larger brass fittings would solve the problem.

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Old 04-06-2007, 04:48 PM   #4
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Thx sparky - I have some sleeves inside the braid to keep it from collapsing, but I wonder if the 3/8 fittings are also restricting the flow. Funny, I have a 1/2" braid on my 2-gal MLT with the same size fittings and it virtually pours out the valve. Maybe some rougher braid is in order?

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Old 04-06-2007, 07:46 PM   #5
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hey would this work in cooker instead of a hop stoper or a bazooka tube?

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Old 04-06-2007, 08:46 PM   #6
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There's a good chance you're just not getting the pump primed (air trapped between the MLT and pump). Try getting your pump a few inches below the MLT or try filling up the water level higher.

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Old 04-06-2007, 09:15 PM   #7
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That's a good thought - I also have the lower-speed of the 809 pumps (809-PL and not the 809-PL-HS). Methinks I should swap it back and spend the extra $10 for a little more oomph.

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Old 04-06-2007, 10:08 PM   #8
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Also, if you thought it might be the braid (instead of the pump or the restriction of the fittings) you could do some trials with the cooler filled with water. Try draining with the braid, and the remove just the braid and try it againto see if it makes any difference. I suspect it won't, but it would be easy to confirm.

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Old 04-06-2007, 11:17 PM   #9
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Quote:
Originally Posted by FlyGuy
Also, if you thought it might be the braid (instead of the pump or the restriction of the fittings) you could do some trials with the cooler filled with water. Try draining with the braid, and the remove just the braid and try it againto see if it makes any difference. I suspect it won't, but it would be easy to confirm.
You read my mind. After the trial this morning, I took the MLT off the cart and let it drain right out the valve onto the driveway and it definitely was less than a 'full flow'. I'd be really surprised if the 3/8" fittings are to blame; it's a straight shot out the T, through the valve and out the barb (which is stepped up to 1/2"). I went with a 1" braid per Palmer's suggestion to avoid crushing the hose with heavy grain bills, but I'm thinking I should use the same 1/2" braid that's in my 2-gal MLT.
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Old 04-06-2007, 11:19 PM   #10
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Quote:
Originally Posted by lostnfoam
hey would this work in cooker instead of a hop stoper or a bazooka tube?
IIRC some folks have mentioned that boiling brass isn't the best for your brew; I think you'd want to find a way to go all-copper/sst for the fittings, but that's basically what the bazooka tube is anyway
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