10" polypropylene woven fibre cartridge 1 micron NSF Aquapro, ref. PR-PPS-10-1

10" polypropylene woven fibre cartridge, 1 micron

Mechanical filtration cartridge in 10" format, polypropylene woven fibre media, filtration threshold 1 micron.

Aquapro reference PR-PPS-10-1.

The 1 micron: a fine threshold

1 micron is the fine threshold of the range. It retains particles that 5 and 10 micron cartridges allow to pass: fine silt, fine rust particles, suspended matter at the limit of visibility, the largest colloids.

This level of fineness has a direct consequence: the cartridge loads faster. At equal flow rate and water quality, a 1 micron clogs significantly faster than a 5 micron.

This is why 1 micron is rarely installed alone.

Position in the system

The 1 micron is placed in second stage, behind a more open prefilter:

• 20 or 25 microns in first stage on heavily loaded water or well water
• 5 or 10 microns in first stage on mains water
• 1 micron in second stage for fine filtration

The first filter handles the load, the second provides fine filtration. This sequencing extends the service life of the 1 micron cartridge and avoids replacing the finest cartridge every two weeks.

Installed alone at the head of the line on unfiltered water, a 1 micron becomes an expensive consumable.

Woven fibre

The media consists of polypropylene thread wound and woven around a central core. The structure creates depth retention, with a higher dirt-holding capacity than a surface media at equivalent threshold.

Polypropylene is inert and compatible with cold potable water. The structure remains stable under flow, with no fibre shedding.

What it protects

In fine filtration, the 1 micron operates before the most sensitive stages:

• reverse osmosis membranes, which fine particles foul and scratch
• block carbon cartridges, whose flow rate drops when the inlet face clogs
• ultrafiltration cartridges, whose threshold clogs quickly without upstream fine filtration
• solenoid valves and precision fittings, sensitive to fine particles

Replacement

Replacement is performed at pressure drop. At 1 micron, the signal arrives sooner than at a more open threshold.

• with upstream prefilter, mains water: 6 months indicative
• without prefilter, or heavily loaded water: a few weeks to a few months
• upstream of a reverse osmosis unit: do not exceed the replacement interval

A transparent filter housing allows visual inspection: the coloured cartridge signals replacement before pressure drop occurs.

Installation

Insert the cartridge in the direction of flow, check the presence and condition of the housing O-ring, tighten with a wrench without forcing, and purge air before returning to service.

An isolation valve upstream avoids a general shutdown at each cartridge change.