Guides › Racking & Lees Management Equipment for Wineries
Cellar Operations · 7 min read
Racking & Lees Management Equipment for Wineries
Racking equipment is the set of tools that draws clear wine off its sediment without disturbing the lees underneath: a gentle pump, a hose, a racking arm or wand, a sight glass to watch clarity, and a way to handle the cloudy lees fraction afterwards. The whole point is selectivity — pulling bright wine off the top of the deposit while leaving the compacted layer behind. This guide explains each component, how they work together, and what to look at before you buy.
This is buying education, not engineering or food-safety advice. Confirm food-contact suitability and cleaning compatibility with your supplier before purchase.
What racking actually asks of your equipment
Racking is deceptively simple to describe and easy to do badly. Wine sits on a bed of lees — dead yeast, grape solids, tartrates, and protein. Over time the solids compact and the wine above clears. Racking moves that clear wine to a fresh vessel and leaves most of the deposit behind.
Good racking equipment does three things:
- Draws selectively — takes wine from above the lees line, not from the bottom of the tank
- Moves gently — without churning the wine or stirring the deposit back into suspension
- Protects from oxygen — every transfer is an oxygen-pickup opportunity, and racking happens repeatedly across a wine's life
Each piece of kit below maps to one of those jobs.
The core racking setup
Most cellars build racking around five component groups.
The pump
For racking, a controllable, low-shear pump matters far more than a fast one. You want to creep up to the lees line and stop, not blast wine across the cellar. Variable speed is the single most useful feature.
Two pump families dominate gentle transfer work:
- Peristaltic pumps squeeze wine through a flexible tube, so the wine never touches a metal impeller. They self-prime, run dry without damage, and reverse easily — useful when you reach the lees and want to back off. A peristaltic pump is a common racking choice for exactly these reasons.
- Flexible-impeller and lobe pumps also handle finished wine gently at modest speeds, though they are less forgiving of running dry.
For the full pump picture, see our winery pumps guide, and for a side-by-side of pump types our wine pump comparison.
Racking arms and wands
The difference between a clean rack and a muddy one is usually the inlet, not the pump. Fixed racking arms and adjustable wands let you draw wine from a chosen height inside the tank:
- Adjustable racking arms on a tank can be swivelled or set to a specific height, so you draw from just above the deposit and lower the inlet as the level drops.
- Floating suction (floating racking) devices sit on the wine surface and follow the level down, always pulling the clearest wine and never reaching the lees until the end.
- Racking wands are simple rigid tubes for moving wine out of carboys, barrels, or small tanks by hand.
A floating suction is the gentlest option for tank-to-tank work because it keeps the inlet far from the deposit for almost the entire transfer.
A sight glass
A sight glass — a clear inline section between hose and pump — lets you watch clarity in real time. When the stream turns cloudy, you are into the lees: that is your signal to stop or switch to a separate vessel. Without one, you are racking blind and guessing where the clean wine ends.
Hoses and fittings
Use food-contact hose rated for wine and for your cleaning method, on a single fitting standard so you are not stacking adapters. Our wine transfer equipment guide covers hose selection, fitting standards, and storage in detail. Keep hose runs as short as your layout allows — every extra metre adds friction, oxygen-exposed surface, and cleaning time.
Inert gas
Because racking happens many times across a wine's life, the oxygen it picks up accumulates. Purge the receiving vessel and the hose with inert gas before wine arrives, fill from the bottom, and blanket any headspace afterwards.
Lees management: what to do with the cloudy fraction
The lees you leave behind still hold recoverable wine, and how you handle them affects both yield and quality.
Gross lees vs fine lees
- Gross lees settle quickly after fermentation: heavy yeast, grape pulp, and seeds. Most winemakers rack off gross lees relatively early to avoid reductive or off-character development.
- Fine lees are the lighter fraction that settles slowly. Some styles deliberately keep wine on fine lees (sur lie) for texture and complexity, racking far less often.
Your racking frequency is a winemaking decision, not an equipment one — but your equipment determines how cleanly you can execute it.
Recovering wine from lees
The cloudy fraction drawn at the end of a rack, plus the contents of barrels and tank bottoms, can be clarified to recover usable wine. Common routes include:
- Settling and re-racking — let the lees fraction settle again in a smaller vessel, then rack the wine that clears on top.
- Lees filtration — a dedicated lees filter (such as a rotary vacuum or a small plate filter) recovers wine from heavy deposit. This overlaps with clarification and filtration equipment; see our wine filtration equipment guide.
How much wine sits in lees varies widely with style, vessel, and handling.
A simple racking equipment matrix
| Component | Job it does | Buying priority |
|---|---|---|
| Variable-speed pump | Gentle, controllable transfer | Low shear, easy slow running |
| Floating suction / racking arm | Draws clear wine above lees | Adjustable height, sanitary design |
| Sight glass | Shows when you reach the lees | Clear, easy to clean, inline |
| Wine-rated hose + one fitting standard | Connects everything | Food-contact, short runs |
| Inert gas kit | Limits oxygen pickup | Regulator + purge routine |
Common racking mistakes equipment can prevent
- Racking from the tank bottom valve. Pulls deposit straight into the receiving vessel. A floating suction or adjustable arm avoids it.
- Racking blind. Without a sight glass you over-rack into the lees or stop early and leave good wine behind.
- Running the pump too fast. Stirs the deposit back into suspension. Variable speed solves this.
- Splashing into the top of the tank. Adds oxygen. Fill from the bottom and purge first.
- Cleaning late. Lees dry hard. Rinse hoses and pump immediately after the rack.
FAQ
What pump is best for racking wine? A controllable, low-shear pump is more important than a fast one. Peristaltic pumps are popular because the wine never touches an impeller, they self-prime, run dry safely, and reverse easily near the lees. Flexible-impeller and lobe pumps also handle finished wine gently at modest speeds.
What does a sight glass do during racking? A sight glass is a clear inline section that lets you watch wine clarity as it moves. When the stream turns cloudy you have reached the lees — that is your cue to stop or divert to a separate vessel. It turns racking from guesswork into a controlled, visible process.
What is the difference between gross lees and fine lees? Gross lees settle quickly after fermentation and contain heavy yeast and grape solids; most winemakers rack off them relatively early. Fine lees are the lighter fraction that settles slowly. Some styles deliberately age wine on fine lees (sur lie) for texture, racking far less frequently.
Can you recover wine from lees? Yes. The cloudy fraction and tank bottoms can be settled and re-racked, or passed through a dedicated lees filter to recover usable wine. How much is recoverable depends on style, vessel, and handling. Many cellars keep lees separate and process them in a batch.
Bottom line
Clean racking comes down to drawing selectively, moving gently, and keeping oxygen out. The equipment that delivers it is modest: a variable-speed low-shear pump, a floating suction or adjustable racking arm, a sight glass to watch clarity, wine-rated hose on one fitting standard, and inert gas. The next step: look at how you currently rack, identify whether you are racking blind or from the tank bottom, and shortlist the one component that would most improve your results.
Compare racking pumps, hoses, and transfer setups on wine.equipment and connect with suppliers for the components your cellar needs.
Related on wine.equipment
- Compare machines side by side
- Browse wine transfer equipment
- What Is Racking in Winemaking?
- Winery Pumps 101: Wine Pump Types Compared
- Peristaltic vs Impeller vs Diaphragm Wine Pumps
- Wine Transfer Equipment: Hoses, Pumps & Fittings Guide
- Wine Filtration Equipment: Methods & Machines
Pumps on wine.equipment
13 indexed. Add the ones worth a number to your shortlist — one request goes to every manufacturer on it.