Inline Hydrophobic Bacteria Filter

The Precision Medical “#1690” inline hydrophobic bacteria filter is a disposable filter cartridge designed for use in portable suction/aspirator systems. It is installed in the suction tubing (between the patient and the vacuum pump) to trap fluids and microorganisms. The filter’s hydrophobic HEPA membrane repels liquid overflow and captures airborne pathogens, protecting the suction pump and patient circuits from contamination. This helps prevent fluid (e.g. blood, mucus) from reaching the pump motor if the collection canister ever overfills or splashes, and ensures that bacteria/viruses are filtered out of the exhaust air.

• Hydrophobic HEPA filtration: The filter element is a hydrophobic (water-repellent) high-efficiency particulate (HEPA) membrane. It provides airborne contaminant and overflow protection. The manufacturer reports a bacterial filtration efficiency (BFE) of 99.99%+ and a viral filtration efficiency (VFE) of 99.99%+. In practice this means virtually all bacteria and virus particles drawn into the line are trapped in the filter media. Because the media is hydrophobic, it will not allow liquid to pass through, so even if fluid splashes onto the filter it will be held on the patient side.

• Dimensions & connections: The filter housing is about 57 mm in diameter. It has two one-way connectors (a male and female end) that attach in-line with standard suction tubing. Typically both ends accept a 1/4″–3/8″ hose-barb (slip-on) connection. (Some sources note that the “machine” end may use a male 1/8″ NPT thread instead, so users should verify the fitting type on their aspirator.) In either case, the filter is placed inline so that all suction airflow from the patient must pass through the cartridge.

• Protection and benefits: By using this inline filter, fluid or debris drawn out of the patient is caught in the filter rather than the pump. Manufacturer literature emphasizes that it “helps to protect against suction pump contamination in the case of canister overflow,” stopping fluid from reaching the pump motor. In other words, it is a safety and infection-control device: it prevents accidental contamination of the vacuum pump (which can be costly to repair or sanitize) and reduces risk of pathogen spread. The hydrophobic filter will also impede any aerosolized mucus or droplets, making the suction system safer for healthcare staff.

• Compatibility: This filter is specifically specified by Precision Medical for use in their portable aspirators. It is listed as the replacement inline filter for the PM60 EasyVac, PM61 PowerVac, and PM63 PowerVac+ aspirator models. In general it can work with almost any portable suction machine that has compatible tubing fittings and enough space for a 57 mm filter element. (Several suppliers note that it “can be used with virtually any portable suction system".) It is often used in clinical settings (hospitals, clinics, EMS) or home care where portable suction units are employed.

• Usage: The filter is inserted in-line between the patient and the suction pump (usually on the canister’s outlet hose). In practice it is disposable – it should be replaced after use or when it becomes wet/contaminated. (While manufacturer guidelines should be followed, in general one filter is used per patient or procedure.) Regular replacement ensures the filter does not become clogged (which would reduce suction power) and maintains sterile conditions.

Specifications (from vendor data): 57 mm filter diameter; filter type hydrophobic/HEPA; bacterial/viral filtration ≥99.99%. Connections are typically 1/4″–3/8″ hose barb for both patient and pump sides (some notes list 1/8″ NPT male on machine side). The filter is sold singly (1 per package). Its small low-profile design allows minimal added dead space or resistance in the suction line.

In summary: The Precision Medical #1690 inline hydrophobic bacteria filter is a single-use HEPA-grade filter cartridge for medical suction units. It uses a water-repellent membrane to safely trap fluids and microbial particles drawn from the patient, thus protecting the vacuum pump and maintaining infection control.