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Frequently asked questions

A bag filter is a flexible fabric or felt bag that fits inside a bag housing, chosen where you need to filter high volumes of water economically — bags typically cost less per unit of dirt-holding capacity than an equivalent cartridge, making them the practical choice for larger commercial and industrial flows.

Bag filters are available in materials like polypropylene felt and polyester, in a range of micron ratings — polypropylene felt is the general-purpose choice, while other materials suit specific chemical compatibility or temperature requirements.

Bags are sized to standard housing designations (commonly size 1 or size 2), so check your housing's spec before ordering — a bag that doesn't match the housing size won't seal properly and will let unfiltered water bypass the media.

Standard bag filters are single-use and disposable — once loaded with sediment they're replaced rather than cleaned, since washing typically damages the felt structure and reduces its rated filtration efficiency.

This depends on what you're filtering out — coarser ratings (50-100 micron) suit general sediment and pre-filtration, while finer ratings (1-10 micron) are used for polishing stages or protecting downstream equipment. Tell us what you're trying to remove and we can help narrow it down.