Water is the quiet running cost of steam sterilization. Every cycle needs steam, and every litre of steam eventually has to be condensed and drained away — so the way a sterilizer manages its water has a direct line to your utility bill, your plumbing load and your facility’s sustainability record.
Where the water goes
In a conventional sterilizer, much of the steam’s journey ends at the drain: jacket condensate, chamber condensate and especially the cooling water that many designs run continuously through the drain line to protect pipework from steam and heat. Generously (or carelessly) engineered, that adds up — around 100 litres of water per cycle is not unusual for older or conventional designs.
The 20 litre difference
Modern RDS Series sterilizers are engineered to use up to 20 litres per cycle — an 80% reduction against that conventional figure. The maths is simple and compounds fast: a department running five cycles a day moves from roughly 500 litres a day to 100 — a saving of about 146,000 litres per year, per machine.
Why facilities care
- Cost — municipal water and the energy to heat it are billed twice: once coming in, once going out. Lower consumption cuts both.
- Infrastructure — less drain cooling means smaller plumbing loads and less strain on older hospital pipework.
- Sustainability — hospitals are under real pressure to cut water and energy use; efficient sterilizers are one of the few changes that shrink both at once.
- Guarantee — efficiency is engineered, not added on: the RDS pressure vessel carries a guarantee of up to 10 years, built on the same in-house manufacturing discipline.
Efficiency across the whole department
Water saving does not stop at the autoclave. Washer-disinfectors, bedpan washers and sluice room equipment all draw on the same supply — which is why Rob Dyer Surgical engineers and supplies the full department: from autoclave sterilizers to sluice room solutions. Upgrading a sterilizer or planning a water-efficient CSSD? Request a quote — a dedicated sales consultant replies within one business day.
Frequently asked questions
How much water does an autoclave use per cycle?
Conventional designs can use around 100 litres per cycle, much of it cooling water protecting the drain line. Modern RDS Series sterilizers use up to 20 litres per cycle — an 80% reduction.
Why do autoclaves use so much water?
Steam must be generated, then condensed and drained, and many designs run cooling water through the drain to protect pipework. Inefficient engineering of that journey — not steam itself — is where conventional machines lose litres.
How much water can an efficient sterilizer save a year?
At five cycles a day, moving from 100 L to 20 L per cycle saves roughly 400 litres a day — about 146,000 litres per machine per year, before the energy saved heating it.