Nitrogen regulator and hose

Many companies service their own fire extinguishers. They have trained a staff member through one of the UK’s extinguisher servicing training bodies and purchase their maintenance tools through Safelincs. In a series of blogs we present these tools to our readers and customers.

The nitrogen regulator and hose is an essential piece of equipment used by servicing engineers on stored pressure fire extinguishers.  When used with the correct adapter or recharge bar (matching the fire extinguisher make), the fire extinguisher can then be connected to a nitrogen gas bottle.  This allows for the fire extinguisher to be re-pressurised.

Safelincs offer a nitrogen regulator and hose with a working pressure of 20bar (300psi).  It also features a ¼” female quick-fit connector.  The regulator and all other equipment required for refilling and servicing fire extinguishers can be found in the tools and spares section of our website.


    1. Hi Mike, engineers use nitrogen mainly to avoid moisture getting into the powder when re-filling powder extinguishers. The nitrogen cylinders are also easier to use on the back of a servicing van rather than striking up an air compressor when at a customer’s site. Nitrogen also avoids adding oxygen as part of normal air to your extinguisher. Normal air also introduces bacterias and allows aerobic bacteria growth in the fire fighting media. To answer your question, when filling at your own site, it might be cheaper to use compressed air, however, this might invalidate the manufacturer’s warranty and could affect the extinguisher negatively. The British Standard refers the question of gas to be used to the manufacturer’s refilling isntruction, which usually refers to nitrogen, eg Jewel Saffire. That said, for example Britannia permits the use of compressed air for re-filling.

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