Sundström SR221 – Pre-Filters (5 Pack)

Sundström SR221 – Pre-Filters (5 Pack)

When you’re working on the tools, in the workshop, around hazardous particles, or just trying to keep your respirator in top condition day in and day out, a reliable pre-filter makes all the difference. The Sundström SR221 Pre-Filters (5 Pack) are a simple but essential addition to your PPE kit, designed to protect your main filters, extend their lifespan, and maintain strong, consistent airflow while you’re on the job. Affordable, easy to use, and built with Sundström’s trusted quality, these pre-filters are a must-have for anyone using Sundström half masks, full face masks, or powered air systems with non-threaded main filters.

The SR221 pre-filter is placed in front of your main gas or particle filter, acting as the first line of defence against the bigger stuff—coarse dust, debris, and both wet and dry particulates that would otherwise clog up your premium filter much sooner. Instead of your main filter doing all the heavy lifting, the pre-filter captures the bulkier particles first, dramatically prolonging the life of your main cartridge. This saves you money, reduces waste, and ensures your respirator stays efficient over longer periods of use.

Made from high-quality polyester, the pre-filter is lightweight but effective, offering reliable performance without impacting comfort or breathability. At just 1 mm thick with a 102 mm diameter, the SR221 is designed to slot perfectly into the pre-filter holder of any Sundström non-threaded main filter. Installation only takes a moment—simply place the pre-filter into the holder, snap it onto your gas or particle filter, and you’re ready to crack on with the task at hand. Whether you’re handling sanding dust, general workshop debris, spray particles, or other contaminants, this pre-filter works quietly in the background to ensure your main filter remains protected for as long as possible.

Sundström has long been known for manufacturing dependable PPE that goes above and beyond the standard, and these pre-filters are no exception. Although small and lightweight, they play a crucial role in maintaining your respirator’s performance. They help reduce unnecessary pressure build-up in your filter system, meaning easier breathing and greater comfort over long shifts—a big win for anyone working in demanding environments like construction, woodworking, manufacturing, spray painting, maintenance, or general trades.

Proper storage is important to keep your filters in top condition. Sundström recommends storing the SR221 pre-filters at room temperature in a clean, dry location. If the packaging seal has already been opened, make sure you keep any unused pre-filters away from contaminants by placing them in an air-tight container. This prevents dust and moisture exposure and ensures each filter is fresh and ready to use when you need it.

Each pack contains 5 pre-filters, giving you great value and the ability to rotate or replace filters as needed without interruption to your workflow. Since pre-filters are low-cost consumables, swapping them out regularly is a smart move—especially if you’re working in dusty or particle-heavy environments where filters tend to clog more quickly.

If you’re relying on Sundström respiratory protection, adding SR221 pre-filters into your routine is one of the easiest ways to extend the life of your equipment, improve breathing comfort, and maintain the highest possible level of safety. Simple, effective, and economical, these pre-filters do exactly what they’re meant to do—and they do it well.