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How to remove condensate water in supermarket

How to remove condensate water in supermarkets?

Removing and collecting condensate water

Evac’s vacuum collection technology for removing refrigeration wastewater and condensate is a flexible and cost-effective solution to design supermarkets and other retail facilities.

Unlike conventional gravity drainage, vacuum generation units transport refrigeration wastewater through an overhead piping network by withdrawing air. This opens a world of design possibilities that would have otherwise been too complicated or costly.

So, how exactly does it work?

The main elements in a vacuum system are the vacuum interface collection points and the vacuum collection units. The collection unit generates the vacuum in the piping using a vacuum pump(s). When an interface collection point is triggered, the higher-pressure atmospheric air flows into the lower pressure piping through the interface collection point. The air travels at high velocity because of the pressure different – pushing the condensate or graywater through the piping to the vacuum collection unit.

Typically, one interface collection point cycle transports the condensate between 10 and 25 meters to the next transport pocket, where a reserve is created to form a slug of water. When the collection point cycles again, the condensate moves another 10-25 meters until it reaches the collection unit. From here, it can be lifted where needed or released to the sewer.

Evac´s solutions use a vacuum to draw condensate upwards to a height of 6 m and beyond. Usually made of PVC or PEHD, the piping is easily accessed and modified, which makes a last-minute addition or modification simple and inexpensive.

Blockages and sedimentation are nonexistent because of the very high water velocity in the vacuum pipe. A breach in the pipe will lead to air leaking into the pipe, not water leaking into the store. Vacuum collection also creates the opportunity for water reuse, making the technology a sustainable choice.

Evac low profile buffer box enables removing condensate water with lower refrigerated cases in supermarkets.

Higher customer experience with lower freezer cases

The latest innovation in Evac’s product portfolio is a low‐profile buffer box to meet the increasingly stringent envelope constraints for under‐case drainage. As the need for accessibility in refrigerated and freezer cases has increased, Evac developed a proprietary buffer box less than two inches tall to fit underneath any case type – no electrician needed.  Innovations in its management of the combined air and liquid flow optimize the buffer box solution, all in a package that is over 50% lower than the standard buffer box.

Why choose vacuum technology for collect and remove condensate water?

Design flexibility

  • Freedom in design – No restrictions on freezer or chiller cabinet placement
  • Additional refrigerated space can be added where it is needed
  • Displays can be changed overnight

Save time and money

  • Shorter and cost-effective construction work in remodeling, building conversion, or relocation
  • Smaller pipe diameter than traditional systems, making installation simpler and more flexible
  • There is no need to close individual departments or the entire store during remodeling projects


  • Sales floor safety hazards associated with trenching are eliminated during construction
  • No leakage or blockage, a breach in the pipe will lead to air leaking into the pipe, not water leaking into the store
Evac people on a service project onboard a vessel

Contact our sales team for more information

Evac is uniquely qualified to support the design of supermarket remodelling programs and geographical expansions thanks to being the original supplier for vacuum drainage with over 40 years of experience and thousands of installations worldwide.

See our product offering for supermarkets and retail

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