In short: A stripping run is a fast first pass that strips all the alcohol and flavor out of a large batch of wash and collects it as low wines, with no cuts made. A spirit run is the slower second pass on those concentrated low wines, where you actually make your heads, hearts, and tails cuts to shape the finished spirit. Most flavorful spirits are made this way, though a modern plated still can also produce excellent results in a single run.
If you have spent any time on distilling forums, you have seen the same disagreement play out over and over. Some still manufacturers tell new distillers to run traditional stripping runs followed by spirit runs. Others say just do one run. Both camps make good product, which is exactly why the question keeps coming back. This guide walks through what each run actually does, when to choose one approach over the other, and the practical mistakes that catch people on the floor.
What is the difference between a stripping run and a spirit run?
The two runs have completely different jobs.
A stripping run is about volume and speed. You charge the still with fermented wash, usually somewhere around 8 to 10 percent ABV, and your only goal is to get the alcohol out of it as fast as the equipment safely allows. You run with little or no reflux, you do not fuss over separating compounds, and you collect everything that comes over as a single combined product called low wines. As the distilling community puts it plainly, the goal of a stripping run is to remove alcohol from large volumes of wash, then make cuts on a second spirit run. For everything but neutral spirit, you collect all the alcohol and flavor at low proof and worry about refinement later.
A spirit run is about separation and character. You take the low wines from one or more stripping runs, combine them into a concentrated charge, and run that pass slowly and deliberately. This is where you separate the run into fractions: heads at the front, the hearts you actually want to keep, and tails at the back. The spirit run is where the spirit gets its shape. Run temperature, reflux, and the timing of your cuts all do their work here, not on the strip.
In short, the stripping run answers "how much alcohol is in this wash," and the spirit run answers "what does this spirit taste like."
Why run a separate stripping still at all?
The single biggest reason is throughput. A common complaint from distillers with one pot still is that it becomes a bottleneck. One operator described running three wash runs followed by one spirit run, four days per batch of spirit, all tying up the same vessel. A dedicated stripping still breaks that logjam. Because several stripping runs typically feed each spirit run, a frequent rule of thumb for whiskey is to size the stripping still around three times the volume of the spirit still.
The second reason is protecting your investment. Copper finishing stills are expensive, and every stripping run uses up their working life. A common move is to buy a cheaper stainless stripping still to handle the brute-force first passes, which protects the copper finishing still and roughly doubles output for far less cost than buying a second finishing still. Distillers who have done this report no change in the finished product when the stripping still is from the same builder and style, and some have multiplied their capacity significantly by adding one.
There is one tradeoff worth knowing if you go stainless on the strip. Copper contact matters for catalysis and sulfur management, so many distillers add copper back into a stainless stripping still. That can be a bypassable copper catalyzer, a copper-lined or copper-plated column, copper packing, or a copper dephlegmator. Surface area is what counts, not thickness, and removable plates let you swap and clean them. It is not a free upgrade, and some find the copper packing messy to deal with, so weigh it against your spirit and your budget.
Do you make cuts on a stripping run?
No, and this trips up a lot of people coming from hobby setups.
On a stripping run you are not trying to separate anything. You collect the whole run as low wines. The separation, the actual heads-hearts-tails decision making, belongs to the spirit run. Trying to make precise cuts on a strip wastes time and gives you no real benefit, because you are going to redistill that material anyway.
The one exception is neutral spirit. If you are chasing high-proof vodka, the logic changes because your whole process is built around stripping flavor out, not preserving it. For whiskey, rum, brandy, and anything else where character is the point, keep it simple on the strip and save your attention for the spirit run.
It is also worth being honest about single distillation. Plates effectively add distillations, so a single pass on a modern plated pot still can produce excellent whiskey. Many microdistillers run once while larger producers double distill to polish the spirit. If you are running a plated still, disabling a plate or two and managing your dephlegmator and reflux often improves whiskey flavor more than adding a second full run. The right answer depends on your equipment, so experiment on your own still rather than taking any one builder's word as gospel.
How should you handle low wines before the spirit run?
This is where a small habit prevents a ruined run.
Before you charge the spirit run, combine your low wines and check the proof of the charge. The reason matters: heads can smear through an entire spirit run when the low wines are not reduced below about 30 percent ABV. Above roughly 30 percent, the heads compounds stay dissolved in the charge and bleed across the whole run instead of presenting cleanly at the front, which makes a clean heads cut nearly impossible. Excess heat and sloppy cuts make it worse. Many distillers deliberately bring the spirit run charge well under 30 percent ABV for exactly this reason.
A few related practices from the floor. Low wines, heads, and tails all store fine in food-grade containers, kegs, or totes, so you can accumulate strips until you have enough for a full spirit run. Recycling heads and tails, often called feints, back into later runs recovers additional alcohol over time. And keep your condenser cooling adequate: spirit collected above about 20 degrees Celsius can suffer a degraded congener balance and pull feints into your hearts, undoing the careful cutting you just did.
One more myth to put down. There is no magic temperature setpoint that completes a stripping run in a fixed time. Temperature has no fixed relation to output volume. You control run time by controlling energy input to the charge, not by chasing a number on a thermometer.
When does single distillation make more sense than two runs?
Choose based on your equipment, your spirit, and your capacity, not on dogma.
Single distillation tends to make sense when you are running a modern plated or column-equipped pot still, when your throughput is low enough that one vessel is not a bottleneck, and when you can dial in cuts well on a single pass. A single column run gives a narrow heart cut, while using plates can concentrate heads and tails and broaden the hearts for more yield. From a healthy wash this works well. Below roughly 8 percent ABV, early tails onset starts to limit useful extraction, which is one reason a strong, clean ferment helps.
The stripping-plus-spirit approach tends to win when you have volume to move, when you want to protect an expensive copper still, and when you want the cleanest possible separation. Batch double distillation is the traditional route for many flavorful spirits, while continuous columns are the workhorses for neutral. Continuous setups can make good whiskey too, but they tend to bleed some heads and tails into the hearts, which often means longer barrel time to clean up.
A regulatory note that decides the question for one category: you cannot reach the proof required to label a spirit as vodka on a conventional pot still without forced reflux equipment. The federal standards of identity for distilled spirits set the floor for vodka and other neutral spirits, and a simple pot still will not get you there. See 27 CFR Part 5 at ecfr.gov and the TTB beverage alcohol guidance at ttb.gov for the current standards before you commit to equipment.
The bottom line
Stripping runs and spirit runs are not competing philosophies, they are two tools. The stripping run removes alcohol from your wash quickly and cheaply, ideally on a vessel sized and built for the job. The spirit run is where you slow down, make your cuts, and decide what your spirit becomes. Whether you run once or twice comes down to your still, your spirit, and how much you need to make. Keep your low wines under about 30 percent ABV before the spirit run, keep your condenser cold, and let energy input rather than a temperature setpoint dictate your pace.
Whichever path you choose, the records have to hold up. Spirit Sight tracks each run, the low wines and feints you carry between them, and the proof gallons at every transfer, so your production ledger and your TTB reporting stay tied to what actually came off the still.