Pepsi Post Mix: Equipment, Syrup and Installation for UK Hospitality

Pepsi post mix is the draught dispense system that lets you serve Pepsi, Pepsi MAX, 7UP and Tango from a tap or dispense gun instead of bottles and cans. Our syrup is delivered in innovative bag-in-box (BIB) containers, mixed with chilled carbonated water at the point of pour, and served fresh into the glass.

For any outlet selling meaningful volumes of soft drinks, it typically cuts cost per serve, removes bottle storage and speeds up service at the bar.

This guide covers how a post mix system works, which Pepsi drinks are available on draught in the UK, what the syrup actually costs you per glass, and what's involved in getting a system installed.

What is post mix?

Post mix is a dispense method where the drink is assembled at the moment of pour — the syrup and the carbonated water meet after leaving their containers, hence "post" mix.

A post mix drink is made from three inputs:

• Concentrated syrup, supplied in a bag-in-box
• Filtered mains water, chilled and carbonated on site
• CO2, which both carbonates the water and pushes the syrup through the lines

Because you're only paying to transport concentrate rather than finished liquid, post mix beverage costs per serve are substantially lower than canned or bottled equivalents — and a single 12-litre box replaces a significant volume of packaged stock in your cellar.

How a post mix system works

A complete post mix drinks dispenser setup has six core components.

Bag-in-box syrup (BIB)

Concentrated syrup in a sealed bag inside a cardboard carton, stored in the cellar or under-counter. A connector clips onto the bag and draws syrup through a line to the dispense point.

BIB pumps

Gas-driven pumps that move syrup from the box to the tower. These sit between the CO2 supply and the syrup lines.

CO2 supply

A cylinder, or a bulk tank in higher-volume sites, providing gas for both carbonation and syrup propulsion.

Carbonator

Combines filtered water with CO2 under pressure to produce carbonated water at the correct volume of carbonation.

Water filtration

Removes chlorine, sediment and off-flavours from mains water, and protects the equipment from scale. In hard water areas this is not optional. Filtration directly determines both drink quality and equipment lifespan.

Chiller and dispense point

An ice bank or remote cooler drops the finished drink to serving temperature, and the drink is poured via a dispense tower or a dispense gun, common in cocktail bars and kitchens where one nozzle serves multiple flavours plus soda and water.

The result is a consistently chilled, correctly carbonated post mix drink poured in seconds, with no fridge space consumed by packaged stock.

Post mix vs pre mix vs cans: which suits your outlet?

Post mix suits any site with steady soft drink volume — pubs, bars, restaurants, quick service, hotels, stadia and leisure. It gives the lowest cost per serve, minimal storage and the fastest service. It requires installed equipment, a water supply and periodic maintenance.

Pre mix delivers finished drink from a keg. There are fewer variables and no carbonator, but a higher cost per litre and much heavier stock to move. It is generally used where water quality or plumbing makes post mix impractical.

Cans and bottles remain right for low-volume sites, takeaway trade and outlets where branded packaging is part of the offer. They carry the highest cost per serve and the highest storage burden.

Most operators run a hybrid: post mix at the bar for volume and mixers, cans for takeaway and bedroom minibars.

Pepsi post mix installation in the UK

A typical installation follows five stages.

1. Site survey
We assess bar layout, cellar location, run distances, water supply and pressure, drainage, power and any existing dispense infrastructure.

2. System specification
Your volume forecast determines chiller capacity, number of flavours, tower versus gun, and whether CO2 runs from cylinders or bulk.

3. Installation
Python lines are run from cellar to bar, the carbonator, chiller, filtration and BIB pumps are commissioned, and the tower or gun is fitted.

4. Commissioning and training
Ratios are calibrated to specification, carbonation is checked, and bar staff are trained on box changes, gas changes and daily checks.

5. Ongoing service
Scheduled line cleaning, preventative maintenance and reactive breakdown cover.

Compliance points to be aware of

Water regulations

Connections must comply with the Water Supply (Water Fittings) Regulations, including appropriate backflow prevention. Fittings should be WRAS-approved.

CO2 safety

Cylinders and bulk gas require appropriate storage, restraint, ventilation and, depending on the installation, CO2 monitoring in enclosed cellars.

Line hygiene

Syrup lines need cleaning to a documented schedule. This protects drink quality and forms part of your food safety records.

Electrical and gas certification

A compliant installation is also a defensible one at your next environmental health visit.

Serve Pepsi on draught in your outlet

Carlsberg Britvic supplies, installs and maintains Pepsi post mix dispense equipment for licensed and foodservice outlets across all of the UK. From a single-tower bar installation to a multi-outlet estate rollout, we handle survey, specification, installation and ongoing service.