Description
MARTYR Pencil Brass Plug Only 3/4"NPT – CMEP3 is a zinc sacrificial marine anode for pencil/engine anodes. It is intended to corrode sacrificially so the protected underwater metal component is preserved.
Water application: Salt Water. Overall dimensions are provided in both centimetres and inches for fitment comparison. Confirm fitment with the full MARTYR manufacturer part number CMEP3; the store SKU may omit or alter MARTYR’s leading CM prefix.
Compatibility: Brass plug for the MARTYR 3/4 in NPT pencil-anode family. Use with the compatible replacement rod(s) listed in this catalog; engine compatibility depends on the engine or heat exchanger calling for this exact 3/4 in NPT plug and rod geometry.
Features
- Protects engine cooling passages, heat exchangers, and raw-water-system components from galvanic corrosion.
- Thread size, anode diameter, and anode length are fitment-critical on pencil/engine anodes.
- Designed to protect engine cooling passages, heat exchangers, or related seawater-system components from galvanic corrosion.
- Thread and anode dimensions are fitment-critical; confirm the full MARTYR part number before installation.
- Zinc alloy application: Salt Water.
Specifications
- Brand: MARTYR Anodes
- Manufacturer Part Number: CMEP3
- Store SKU: CMT-EP3
- Anode Type: Pencil/Engine Anodes
- Material: Zinc
- Recommended Water Type: Salt Water
- Compatibility / Applications: Brass plug for the MARTYR 3/4 in NPT pencil-anode family. Use with the compatible replacement rod(s) listed in this catalog; engine compatibility depends on the engine or heat exchanger calling for this exact 3/4 in NPT plug and rod geometry.
- Alloy / Standard: MIL-DTL-18001L
- Nominal Weight: 2 kg (4.409 lb)
- Overall Dimensions: 10 x 10 x 25 cm (3.94 x 3.94 x 9.84 in)
- Application / Fitment: Pencil Brass Plug Only 3/4"NPT

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