Pentair HF Series Pleated Sediment Filter - Washable, 10" or 20" x 2.5", 1-50 Micron NZ

A washable, reusable pleated sediment filter for standard 2.5" housings — suits under-sink, whole-house, and general water filtration.

The Pentair HF Series is a pleated sediment cartridge available in 10" and 20" lengths and four micron ratings. The pleated design increases surface area compared to a standard wound or spun cartridge, holding more sediment before restriction and keeping pressure drop low as the filter loads. When dirty, rinse clean and refit.

Note: the 1 micron rating uses polypropylene media. The 5, 20, and 50 micron ratings use polyester media.

Select your size and micron rating using the dropdowns above.

Which micron rating do I need?

General guidance: run coarser ratings upstream and finer ratings downstream. A common two-stage setup uses a 20 or 50 micron cartridge in the first housing and a 1 or 5 micron in the second.

Which size do I need?

• 10" (250mm) — fits standard 10" x 2.5" filter housings. Suited to under-sink systems and single-tap filtration.
• 20" (500mm) — fits standard 20" x 2.5" filter housings. Higher dirt capacity and longer service life between cleanings. Suited to main water lines and whole-house filtration.

Match the length to your existing housing. Both are 2.5" in diameter — standard slim housing size.

Key specs at a glance

• Material: polypropylene (1 micron) | polyester (5, 20, 50 micron)
• Diameter: 2.5" (standard slim housing)
• Lengths: 10" (250mm) or 20" (500mm)
• Micron ratings: 1, 5, 20, 50
• Max temperature: 37.8°C | Max pressure: 4.0 bar
• End caps: PU | Centre pole: polypropylene
• Washable and reusable
• Fits all standard 10" x 2.5" and 20" x 2.5" filter housings

Full specifications

What's in the box

• 1 x Pentair HF Series pleated sediment cartridge (size and micron as selected)

Frequently asked questions

What makes a pleated filter different from a standard sediment cartridge?

A pleated filter folds the media back and forth, creating a larger surface area than a flat or wound cartridge of the same size. More surface area means more dirt-holding capacity before flow restriction — and a lower pressure drop as the filter loads, which helps maintain water pressure through the system.

Can I wash and reuse it?

Yes. When flow drops or the cartridge is visibly dirty, remove it from the housing, rinse under a hose or tap, and refit. The number of wash cycles depends on water quality — fine silts embed more readily than coarser sand. Replace the cartridge when rinsing no longer restores adequate flow.

Why does the 1 micron rating use a different material?

The 1 micron rating uses polypropylene media, which holds its shape and filtration performance at very fine ratings. The 5, 20, and 50 micron ratings use polyester, which is well suited to medium and coarse sediment removal and handles repeated washing well.

Which micron rating is right for my supply?

Coarser ratings (20 or 50 micron) suit first stage pre-filtration where sediment load is visible. Finer ratings (1 or 5 micron) suit second stage or final stage filtration, or where you need to protect downstream equipment such as a UV lamp. If you run two housings in series, use the coarser rating in the first housing and the finer rating in the second.

Will it fit my existing housing?

Yes, if your housing is a standard 10" x 2.5" or 20" x 2.5" size. This is the most common slim housing format used in under-sink and whole-house filtration systems. Check your housing length before ordering — 10" and 20" cartridges are not interchangeable.