Racor R125S Aquabloc Spin-on Element

Part Number: R125S
Made By: Parker Racor
Aquabloc Spin-on Element 4125-7125R
Replacement Cartridge Filter Elements – Racor Spin-on Series

Spin-on Series replacement elements are compatible with Racor’s line of Spin-on Series fuel filter / water separator assemblies. The elements exhibit exceptional removal efficiency of both bulk and emulsified water, low restriction of fuel flow, and high dirt-holding capacity. Their unique design makes them capable of performing in modern diesel and gasoline engine applications, where high-pressure conditions can cause tiny particles of dirt and water to score and erode precision components, leading to engine damage and increased downtime.

The filter body is protected with a durable electrostatically-applied powder coating for superior corrosion resistance. The spin-on filter design is simple to service and features a reusable clear engineering plastic or metal contaminant collection bowl with a self-venting drain for draining out collected contaminants and water.

All Racor Spin-on Series replacement filter elements utilize Racor’s high-efficiency Aquabloc® engineered media. Aquabloc® is a blend of high-grade cellulose compounded with resins and a special chemical treatment. It incorporates pleat-spacing corrugations and a graduated pore structure to increase dirt-holding capacity and extend filter life. The media is waterproof and rustproof, capturing contaminants while the specially treated surface separates and coalesces water from the fuel, which causes the water to gather into large droplets that then fall into the fuel filter’s collection bowl.

Dimensions 21.8 cm
Flow Direction

Outside In

Micron Rating

98% @ 4 Micron μm


3.75" Male Bottom Threads



Element Type

2 Micron Aquabloc® Spin-on

Diameter (OD)

4.4 in / 11.2 cm

Product Range

Diesel Spin-on Fuel Filter/Water Separator

Product Series

7125R, 6125R, 4125R

Thread Size



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