The 5 Glasswasher Installation Mistakes That Cost Pub Landlords Money
A glasswasher going down on a Saturday night with 180 covers to feed and a quiz night kicking off at eight is not a theoretical problem. I’ve seen it happen here at Teal Farm, and I’ve spoken to enough landlords across the Marston’s estate to know that most glasswasher headaches trace back to the same five installation errors made weeks or months before the machine ever failed.
Get these right from the start and you’ll save yourself the repair bills, the downtime, and the very unpleasant conversation with your NSF auditor.
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1. Wrong Drain Setup — The Pump Rule
This is the one that catches more operators than anything else. A gravity drain only works if your drain point sits below the machine’s outlet. In most pub bars, it doesn’t. The drain is in the floor, the machine sits on a raised platform or behind a bar run, and the fall simply isn’t there.
The answer is a built-in drain pump, and if you’re specifying a machine, I’d make it non-negotiable. Don’t assume the installer will flag it. Assume they won’t, because sometimes they don’t. At Teal Farm we run a pump-equipped unit for exactly this reason. If your glasswasher doesn’t have one and the drain height is wrong, you’ll know about it the first time it floods your bar mat.
Always ask: does this machine have a built-in drain pump? If not, do I need one? Get the answer in writing.
2. Wrong Location
A glasswasher generates heat, steam, and noise. Put it directly under a food service pass or next to an ice machine and you’ll create problems on all three fronts. Ice machines need cold ambient air to function efficiently — steam from a glasswasher kills that fast.
Think about glass flow too. Where are dirty glasses coming in from? Where do clean ones need to go? If your bar team are walking past each other with full trays to get glasses to and from the machine, you’re building inefficiency into your busiest periods.
3. No Water Softener
Washington sits in a moderately hard water area. If you’re elsewhere in the UK, check your local water hardness before you buy a machine. Limescale will coat your heating element, destroy wash quality, and shorten machine life significantly.
A dedicated inline softener — or a machine with a built-in softening system — is not optional in hard water areas. It’s maintenance budget. A reasonable inline unit like the Hydroflow HS38 Water Conditioner costs a fraction of what you’ll spend on engineer callouts and element replacements if you skip it.
4. Wrong Chemicals
Glasswashers need specific low-foam detergent and rinse aid formulated for the job. I’ve seen operators put through standard catering detergent because it was already on the shelf. The result is excessive foaming, poor rinsing, and glasses that come out with a residue film that affects the head on every pint you pour.
Match your chemicals to the machine manufacturer’s spec. Set your dosing pumps correctly at installation and check them monthly. It takes ten minutes and it protects both your EHO score and your beer quality.
5. Skipping the Commissioning Check
Every new installation should include a witnessed commissioning run where temperatures, cycle times, dosing rates, and drain performance are all verified and recorded. This matters for your EHO records and your NSF audit. At Teal Farm, I keep commissioning documentation in the same folder as my 5-star EHO cert.
If your installer wants to “just leave it running and you’ll be fine,” push back. Get the numbers on paper.
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