the Editor says: For this special feature, we spared no expense travelling all the way to Kenting and Xiaoliuqiu to conduct a blind test of scuba diving regulators. We also invited Coach Lin Yu-Ping from Divingmate to share his professional insights on the results. What qualities should a good regulator have? Do overseas brands really blow Taiwanese home-grown brands out of the water? And how do you choose the right regulator for yourself? Let the fun video walk you through all the key ideas!
What qualities should a good scuba diving regulator have?
A good regulator actually involves many layers, such as stable intermediate pressure output, consistent breathing resistance, and components that resist wear over time — especially the metal springs inside the first and second stages. Every brand has its own unique patented designs and material quality standards. Before making a purchase, be sure to consult friends around you or a professional dive instructor, and of course do your own homework. We've also put together a few articles here to help you get up to speed quickly.
- Introduction to Regulators — First Stage Regulator
- Introduction to Regulators — Second Stage Regulator
- Everyday Regulator Maintenance Tips
- How Well Do You Know Your Regulator?
The myth of regulator brands
Many divers harbour an inexplicable fascination with certain specific brands or particular regulator models, believing that once they buy one they can enjoy top-quality diving without a care in the world. But in the eyes of a professional regulator tuning specialist, there is no such thing as a regulator that is absolutely guaranteed to breathe well.
Take a high-end imported regulator, for example. From the moment it leaves the factory — through warehousing, shipping, and display on a shop floor — until it's finally bought and used by a consumer, how much time has passed? The intermediate pressure seats, O-rings, and other components inside will have degraded over time, meaning the various factory-spec values may have already changed. And how many retailers, when handing a regulator over to a customer, actually take the time to carefully re-tune it with proper instruments beforehand?
Lin Yu-Ping: I once tuned an inexpensive domestic regulator to breathe better than a high-end imported one. Even though it took a lot of time to adjust, it was absolutely achievable — patience in fine-tuning is what really matters!
Of course, to be practical about it — when certain brands prioritise cost reduction, the materials used for some components inside the regulator will differ, and this can affect whether overall performance degrades more quickly over time and whether the service interval needs to be shortened. However, if you carefully weigh the initial purchase price against long-term maintenance costs, you may well be able to find a regulator that offers excellent value for money!
How do you choose the right regulator for yourself?
From a data perspective, as long as a regulator can maintain a stable air supply and doesn't vary its output with changes in scuba tank / cylinder pressure, it can broadly be considered a "good" regulator. In practice, however, everyone defines "breathing comfortably" differently. There was once a diver who had been using a regulator with extremely high breathing resistance — one that required a much stronger inhale to activate the second stage lever and trigger airflow. When suddenly given a regulator with outstanding performance figures, they found the airflow too abundant and difficult to use. That's simply because you've gotten used to what you had!
When making a purchase, it's recommended that you borrow one from your dive buddy and actually try it underwater. As the video demonstrates, the experience on land and underwater can differ significantly — and in fact, breathing feel can vary between greater depths and shallower depths too. So the best way to evaluate a regulator is simply to take it down for a real dive and try it out!
When should you service your regulator?
Follow the servicing recommendations provided by each manufacturer. Generally speaking, servicing is recommended after one year of use (or after 100 cylinder fills). Be sure to choose a professional and trustworthy service team. Some shops will do nothing more than replace the O-rings or run the unit through an ultrasonic cleaner, yet claim the full service is complete. A proper, comprehensive service requires careful adjustment of all relevant parameters using the appropriate instruments.
Regulator servicing isn't simply a matter of disassembly — it involves a whole series of adjustments to find the perfect breathing sweet spot for each individual regulator!
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