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Posted: **Tue May 04, 2021 2:13 pm**

Just a question if I am looking to upgrade (a small upgrade) the size of my boiler, in relation to my liebig (900mm long inch over half inch copper domestic plumbing pipe) the boiler i am looking at limits the recommended wattage if using a potstill head from 2400 down to 1900. My potstill head is a 2 inch column reduced down to half inch after two two inch 90 degree bends then onto my condensor. Is the limit imposed due to some potstill heads having a small outlet from the condensor thus having the potential to overpressure or get clogged if distilling on the grain, NZ Chris did mention something in another post, any guidance would be appreciated. Its a 35l boiler I'm looking at

Posted: **Tue May 04, 2021 2:25 pm**

My 36" (~900mm) Liebig made of 3/4" over 1/2" can handle my keg boiler fitted with 6kW of heater elements without issue, so your suggested wattages should be easily handled. Just for future thought, there's no functional advantage to the deeper water jacket of 1" over 1/2", it just weighs more and costs more.

Posted: **Tue May 04, 2021 3:49 pm**

Thanks Zed
My choice of inch was dictated by having some fairly thick copper wire to run on the half inch to create some turbulence, three quart wouldn't fit over. Is heavy but its got a brace. Thanks for the help
Cheers

Posted: **Tue May 04, 2021 3:56 pm**

The higher volume in a 1" jacket is better if you want to automate the water flow.

Posted: **Tue May 04, 2021 5:00 pm**

Thanks Chris, I understand the water flow controlling the temp on a reflux. Is there any advantage of controlling the water flow on a liebig other than water conservation? I'm lucky as I have a 12v sub pump in a 30k water tank that recircs so water is no issue for mine

Posted: **Tue May 04, 2021 5:11 pm**

Sporacle wrote: ↑Tue May 04, 2021 5:00 pm Is there any advantage of controlling the water flow on a liebig other than water conservation?

Posted: **Tue May 04, 2021 5:35 pm**

I do it because I have constantly changing demand with some of my stills. It's especially good if you're running a still off grid on a wood fire or solar and have limited water or have to cart it.

Posted: **Tue May 04, 2021 5:58 pm**

Yummyrum wrote: ↑Tue May 04, 2021 5:11 pm
Sporacle wrote: ↑Tue May 04, 2021 5:00 pm Is there any advantage of controlling the water flow on a liebig other than water conservation?

Well you learn something every day, I was running full flow assuming that was better and I now know what huffing is, my little still was doing that. I'm assuming that the huffing has a knock on effect at the head of my still as well. So we are now getting a valve on my liebig, am I right in assuming on the outlet? Then just keep temp control hot at the top cool at the bottom
Thanks heaps

Posted: **Tue May 04, 2021 6:50 pm**

I always control before the inlet to minimize the pressure on fittings and hoses, which have a tendency to fail when you have a visitor that you want to impress with your still building skills, or if you're not watching.

Posted: **Tue May 04, 2021 7:05 pm**

NZChris wrote: ↑Tue May 04, 2021 6:50 pm I always control before the inlet to minimize the pressure on fittings
Inlet it is
Thank

Posted: **Tue May 04, 2021 9:41 pm**

I control coolant flow with a valve on the outlet . My pump is not up for too much pressure and I distill out side so possibility of a blowout and mess everywhere is minimal But I understand why Chris does it the otherway .

Edited for clarity

Posted: **Wed May 05, 2021 3:53 am**

My liebig is 54" long, and I am using a 5500 watt element. I can strip it as fast as I want...but you still need to slow it down on a spirit run.

Posted: **Mon May 10, 2021 10:35 pm**

Yummyrum wrote: ↑Tue May 04, 2021 9:41 pm I control coolant flow with a valve on the outlet . My pump is not up for too much pressure and I distill out side so possibility of a blowout and mess everywhere is minimal But I understand why Chris does it the otherway .

Edited for clarity

Well thankyou Yummy and NZ Chris, I have valved my liebig and am in the middle of a stripping run, my little still started huffing, water flow down and bingo. I do have a temp gauge at the high point although I am starting to understand what my still is doing based on output. It is amazing the head temp stability compared to what it was when the liebig was full flow. My technical measurement now for water flow is ... ouch, hot, warm, cooler and cool as I run my hand along
Thanks heaps

Posted: **Tue May 11, 2021 12:34 am**

I tried using thermochromic paint on my Liebigs. It was very educational as I could see the hot/cold interface moving up and down the Liebigs during the runs.

Posted: **Tue May 11, 2021 12:59 am**

Sporacle wrote: ↑Mon May 10, 2021 10:35 pm My technical measurement now for water flow is ... ouch, hot, warm, cooler and cool as I run my hand along

Thats the way , the more you learn to do things by using your senses , the better the distiller you will become.

Posted: **Tue May 11, 2021 1:14 am**

Well I got the liebig running like a dream, so stoked with that..... so now I can strip harder and harder....oh apparently I can't strip that hard, puked..... so next lesson learnt, rack and clear a bit longer before you run it and don't overfill your boiler. Didn't scorch anything so going to follow Chris's advice and add it to the spirit run after I strip the next couple of washes (slower and more carefully)

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