4500Psi PCP Air Compressor Oil Water Filter - High Pressure Separator

In this review of the 4500Psi PCP Air Compressor Oil Water Filter, the bottom line is simple: this is a workmanlike high-pressure separator for shooters and divers who need reliable removal of oil and moisture before charging tanks. The reviewer found it robustly built from anodized space aluminum, easy to integrate with common pumps via 8mm quick connectors, and effective at removing most contaminants. It is not a luxury accessory but a practical, heavy-duty inline filter that prioritizes pressure rating and durability for demanding use.

Key Features

• High service pressure: Rated to 30MPa / 300bar / 4500psi so it works with high-pressure PCP compressors and scuba charging rigs without compromise.
• Effective separation: The dry cellucotton element removes roughly 90-95% of water and oil, protecting valves and regulators downstream.
• Durable construction: Seamless alloy aluminum body with thick walls and golden anodized finish resists corrosion and mechanical wear in workshop or field use.
• Compatibility: 8mm male inlet and 8mm female outlet quick connectors and a 50cm soft hose make it easy to attach to most pumps and accessories.
• Serviceability: The drain screw allows quick release of accumulated oil-water mixture after a run, simplifying maintenance between fills.

Who It's For

This filter is aimed at PCP air rifle owners, small dive tank chargers, and hobbyists who run high-pressure compressors and need a compact inline separator to reduce oil and moisture carryover. Its 4500psi rating makes it suitable for users who regularly work near 300bar and require a robust component that will not become the weak link of a charging system.

Users who need a full multi-stage purification system or certified breathing gas filtration for commercial diving should look elsewhere; this product is a practical filter for equipment protection and hobbyist to semi-professional use rather than a medical-grade breathing air purifier.

Pros & Cons

Pros

• High pressure rating of 30MPa / 300bar / 4500psi provides confidence when charging high-pressure cylinders.
• Removes the majority of oil and water with a replaceable quality cellucotton element, extending downstream component life.
• Sturdy seamless alloy aluminum construction and anodized finish offer long-term durability in shop environments.
• Simple drain screw and quick connectors make routine maintenance and hook-up straightforward.

Cons

• Filter captures about 90-95% of contaminants, so it may not replace multi-stage or certified breathing air filtration for critical applications.
• Element lifetime is specified in liters of gas rather than hours, so tracking replacement intervals requires monitoring usage volumes.

Specifications

Model	4500Psi PCP Air Compressor Oil Water Filter
Service pressure	30MPa / 300bar / 4500psi
Body material	Space aluminum, golden anodized
Dimensions (OD x length)	50mm x 300mm
Connectors	8mm quick male inlet, 8mm quick female outlet
Filter element	Quality cellucotton, element lifetime ~40 x 6.8L gas
Hose length	Soft pipe 50cm

Our Verdict

The 4500Psi PCP filter is a rugged, no-nonsense inline separator that delivers strong pressure capability and solid oil-water removal for hobbyist and semi-pro charging setups. It is good value for anyone wanting to protect compressors, regulators, and rifles from contamination, though those requiring certified breathing air should choose a dedicated multi-stage system.

Frequently Asked Questions

How much oil and water does it remove?
It filters roughly 90-95% of oil and water with the supplied cellucotton element, reducing carryover into downstream equipment.

Will it fit my compressor?
It uses 8mm quick connectors and a 50cm soft hose, so it is compatible with many popular pumps and setups that accept 8mm fittings.

How do you service the filter?
After a run loosen the drain screw to release accumulated oil-water mixture and replace the cellucotton element per usage volume recommendations.