Sacrificial Zinc Anodes
Zinc anode plugs corrode in place of your equipment, protecting heat exchangers, pumps, tanks, pipelines, and engines from galvanic corrosion. When the zinc is spent, replace just the rod and keep the plug.
Get a Quote or Order
Call (800) 456-8721 or send us these details and we'll respond the same business day.
- NPT size (see the sizing chart)
- Rod length
- Complete plug or replacement rod only
- For replacement rods, your existing plug dimensions
- Quantity and date needed
Also known as:
| Specification | Details |
|---|---|
| Type | Sacrificial zinc pencil anode plug |
| Anode | Replaceable zinc rod |
| Plug (Bushing) | Brass, NPT threaded |
| NPT Sizes | 1/4" through 1" (over 1" NPT: use 1" parts with a reducing bushing) |
| Rod Diameters | 1/4" through 1" |
| Rod Lengths | 1" through 14" |
| Replacement Rods | Sold separately (no need to buy the whole plug) |
| Inspection | Check anodes every 6 to 12 months |
| Custom Options | Made to your exact spec |
| Delivery | In-stock items ship within 24 hours |
Reduce Corrosion. Prevent Damage.
Zinc Anode Plug Sizes
| Zinc Corrosion Plug Specifications | |||
|---|---|---|---|
| Size NPT (in.) | Rod Diameter (in.) | Rod Length (in.) | Part No. |
A Metal That Sacrifices Itself
When two different metals are connected and exposed to seawater or other water, they create an electrical current that leads to corrosion. A sacrificial anode adds a third metal that corrodes faster, protecting the other two.
Heat exchangers, often made of copper alloy, are prone to galvanic corrosion. That's why zinc anode header plugs are so common: they're easy to replace and keep the exchanger itself from wearing away.
Cut Delivery From Weeks to Days
Complete plugs and replacement rods ship within 24 hours when in stock.
Zinc Anode FAQ
Why would I need a sacrificial anode?
Seawater and other water can create an electrical current between two metals that causes corrosion. A third metal that "sacrifices" itself first gives you an easily replaceable part that protects your equipment.
Which equipment benefits from an anode plug?
Heat exchangers, pumps, tanks, pipelines, and engines commonly have anode plugs built in. Boats and other equipment regularly exposed to seawater are more likely to corrode and may benefit from a zinc anode plug.
How often should I check my anodes?
We suggest checking your anodes every 6 to 12 months.
Can I buy just a replacement rod or pencil anode?
Yes. Contact us with the rod size you need and the dimensions of your existing plug.
What material is the NPT bushing?
Brass.
What if I need a size that isn't listed?
We're a full machine shop and can customize your anode plug to your exact spec. Send us your project details.
Why Choose USA Industries
From pipe blinds to heat exchanger tools, we deliver custom-engineered products with the fastest turnaround times in the industry.
Fastest Turnaround
Available 24/7 - 365 days a year with same-day shipping available on stock items. Custom orders in days, not weeks.
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Custom Engineering
Custom solutions designed to your exact specifications.
ISO Certified Quality
A quality driven ISO 9001:2015 certified manufacturer ensures consistent excellence.
BBB A+ Rated
The highest grade awarded, signifying USAI operates with high integrity and a strong commitment to resolving customer issues.