Zinc Anode Header Plugs (Sacrificial Anodes)
Reduce Corrision and Prevent Equipment Damage with Sacrificial Zinc Anodes
PRODUCT DESCRIPTION
Sacrificial Anodes are used in various settings like refineries, heat exchangers, water heaters, pipelines, tanks (above and below ground), boat hulls, and car engine cooling systems. They shield different metals from corrosion.
ZINC ANODE/ BOAT ZINC PRODUCT FEATURES:
- Prevent damage from galvanic corrosion
- Rod lengths available from 1" to 14"
- Rod diameters available from 1/4" to 1"*
- Replaceable zinc anode
- Soft rubber material conforms to provide a tight seal
- In-stock items ship within 24 hours
For sizes larger than 1" NPT, use 1" parts and install a reducing bushing
For use in heat exchangers, pumps, tanks, pipelines and engines
Other Names/Uses
- Boat Pencil Zincs, Pencil Anodes, Engine Anodes, Marine Zincs, Zinc Engine Anodes, Pencil Zinc Engine Anodes, Galvanic Corrosion Anodes, Galvanic Sacrificial Anodes
HOW ZINC ANODES WORK:
Heat exchangers, often made of copper alloy, are prone to galvanic corrosion. Zinc Anode Header Plugs are commonly installed in them to prevent this. These plugs can be found in the exchanger and are easily replaceable. It's advisable to check internal anodes annually if your equipment has them.
Sacrificial anodes work by preventing galvanic corrosion. When two different metals are connected and exposed to seawater, they generate electrical current, leading to corrosion. To counter this, a third metal, faster to corrode than the other two, is introduced to the circuit, sacrificing itself to protect the other metals.
Replacement anodes are available separately, eliminating the need to buy the entire plug assembly.
| Size NPT (in.) | Rod Diameter (in.) | Rod Length (in.) | Part No. |
|---|---|---|---|
| 1/4 | 1/4 | 1 | AP-0250-1 |
| 1/4 | 1/4 | 2 | AP-0250-2 |
| 1/4 | 1/4 | 3 | AP-0250-3 |
| 1/4 | 1/4 | 6 | AP-0250-6 |
| 3/8 | 3/8 | 2 | AP-0375-2 |
| 3/8 | 3/8 | 3 | AP-0375-3 |
| 3/8 | 3/8 | 6 | AP-0375-6 |
| 1/2 | 1/2 | 3 | AP-0500-3 |
| 1/2 | 1/2 | 6 | AP-0500-6 |
| 1/2 | 1/2 | 8 | AP-0500-8 |
| 3/4 | 3/4 | 4 | AP-0750-4 |
| 3/4 | 3/4 | 6 | AP-0750-6 |
| 3/4 | 3/4 | 8 | AP-0750-8 |
| 1 | 1 | 4 | AP-1000-4 |
| 1 | 1 | 6 | AP-1000-6 |
| 1 | 1 | 1 | AP-1000-10 |
| 1 | 1 | 14 | AP-1000-14 |
BWG Tube Sizing Chart
A SPECIAL WORD OF CAUTION:
USA Industries highly recommends you use our One Rev Internal Tube Cutter to puncture the tube before installing any plug to ensure that pressure cannot build up in the tube and cause the plugs to loosen or blow out.
INSTALLING TUBE PLUGS?
Ask For USA Industries' One Rev Internal Tube Cutter to Puncture Tubes Before Installation!
Frequently Asked Questions
We are a full machine shop, and we're capable of customizing your anode plug to your exact spec. Please contact us with your project details, and we'll be happy to assist you.
The NPT on our anodes are made of brass.
Seawater, and other kinds of water, can create an electrical current between two metals that results in corrosion. By introducing a third metal that 'sacrifices' itself before the other metals start to corrode, you have an easily replaceable part that prevents corrosion on your equipment.
We suggest you check your anodes every 6-12 months.
Absolutely. We're happy to sell you just the anode, please contact us with the size of rod you need, and the dimensions on your existing plug.
Heat exchangers, pumps, tanks, pipelines and engines are all common equipment that have anode plugs built in. Boats and other equipment that are regularly subjected to seawater have a higher chance of corrosion and may benefit from a zinc anode plug.