5" PS Protect replacement filter element USTM — 1 µm, 5 x 2.5" size, max flow 15 L/min

USTM PS Protect 5" replacement filter element is a mechanical depth filter made from polypropylene with a zinc-based antibacterial agent. Designed for 5 x 2.5" housings, it provides 1 µm nominal filtration to remove sand, silt, rust and other fine particulates. The cartridge uses a gradient structure that traps larger particles on the outer layers and finer particles toward the centre, which improves contaminant retention and helps extend service life. It is rated for a maximum flow of 15 L/min, a maximum operating temperature of 40°C and delivers a low pressure loss of approximately 0.2 bar. The material is safe for contact with food and the antibacterial additive offers additional control of microbial growth without continuous release of active substances into the water.

Advantages

The PS Protect element combines mechanical filtration with a zinc-based antibacterial agent to reduce bacterial colonisation on the cartridge surface while keeping filtration purely physical. The depth-gradient construction increases dirt-holding capacity and reduces clogging frequency compared with single-layer filters. Low pressure drop at recommended flow rates preserves system efficiency and helps maintain consistent water pressure. The polypropylene construction is chemically stable for typical cold-water use and is certified for safety in food-contact applications. Typical service life reaches up to nine months under normal municipal water conditions.

Suitable for

• Pre-filtration for household drinking water systems
• Inline filtration in point-of-use housings (5 x 2.5" standard)
• Protection of downstream cartridges and appliances from sand, silt and rust
• Applications where additional antibacterial surface protection is beneficial
• Cold water filtration where maximum flow does not exceed 15 L/min

Key specifications

• Filtration rating: 1 µm (nominal)
• Size: 5 x 2.5 inches (standard cartridge length and diameter)
• Material: polypropylene depth filter with zinc-based antibacterial additive
• Maximum recommended flow: 15 L/min
• Maximum operating temperature: 40°C
• Typical pressure loss: ~0.2 bar at recommended flow
• Structure: gradient/depth-wound design for increased dirt-holding capacity
• Suitable for food-contact applications; certified for safety

How to use

Install the filter element into a compatible 5 x 2.5" filter housing following the housing manufacturer’s instructions. Flush the new cartridge for several minutes before use to remove any loose fibres and to condition the antibacterial surface. Operate within the specified maximum flow and temperature limits; avoid hot-water systems or pressures above recommended values. Replace the element when flow rate decreases noticeably, water quality indicators worsen, or after the typical service period has elapsed. Observe local plumbing codes and disconnect system pressure before changing the cartridge.

Usage recommendations

For best performance, use this 1 µm cartridge as pre-filtration ahead of activated carbon or fine membrane stages to protect downstream elements and extend their life. Monitor pressure differential to determine replacement timing rather than relying solely on calendar intervals, and always select housings and fittings rated for the stated temperature and pressure.