Bradford White water heater anode rod replacement on most residential gas models means unthreading the hot water outlet nipple, because Bradford White's Defender service manual lists the anode and outlet nipple as one part. Turn the gas control to OFF, shut the cold supply, drain below the outlet, then remove it with a pipe wrench.
Figures checked September 2026. Part prices come from listings loaded on 16 September 2026; manual and warranty wording comes from the Bradford White documents under Sources.
| Part (Bradford White number) | Price, listing 1 | Price, listing 2 | Labor | Source |
|---|---|---|---|---|
| 415-55482-00 magnesium anode rod | $128.52 (FurnacePartSource) | $131.04 (Blackhawk Supply) | Not included | Listings, Sep 2026 |
| 415-47782-08 hex-head magnesium, 3/4 in. NPT x 47 in. | $65.95 (BradfordWhiteParts.com) | $131.68 (FurnacePartSource) | Not included | Listings, Sep 2026 |
| 415-47782-12 hex-head magnesium, 3/4 in. NPT x 52 in. | $71.95 (BradfordWhiteParts.com) | $90.17 (FurnacePartSource) | Not included | Listings, Sep 2026 |
| 415-47776-12 magnesium, 2-1/2 in. nipple x 47 in. | $98.95 (BradfordWhiteParts.com) | One listing found | Not included | Listing, Sep 2026 |
| Professional replacement, parts and labor | n/a | n/a | $125 to $300 (Fixr); $150 to $350 (HomeGuide) | Fixr and HomeGuide, Aug 2025 |
A part number on this table is an example, not a fitment claim. Bradford White and its parts sellers match rods by model and serial number, so check yours before ordering.
On most Bradford White residential gas tanks the anode is built into the hot water outlet nipple on top of the heater. The parts diagram in service manual 238-51542-00E labels item 2 "Hot Water Outlet/Anode", and the replacement procedure removes the outlet nipple and anode together. There is usually no separate hex head to look for.
That manual covers the Defender Safety System atmospheric vent family, including the RG230T, RG240T, RG250T, RG250H and RG275H series, per its cover page (Bradford White, service manual 238-51542-00E, revised August 2022). The current direct vent manual says the same thing in words: a combination sacrificial anode rod and hot water outlet nipple is installed to extend tank life (Bradford White, 238-54724-00E, August 2026).
Not every Bradford White tank is built this way. The OEM parts catalog also sells hex-head rods that thread into their own port, which is why forum threads disagree about where the rod is. If you cannot find a hex head on top of the tank, check the hot outlet connection first.
Bradford White's residential manuals and warranty refer to a magnesium anode, and the company recommends aluminum where water is softened or low in pH. Its technical bulletin on anode rods, updated July 2024, calls magnesium "a leading anode material" because it gives up electrons more freely than aluminum, which is also why it wears faster in conductive water.
The same bulletin gives the fix for air, sputtering or odor in the hot water: step down to a less reactive rod, magnesium to aluminum or aluminum to an aluminum alloy, and check water chemistry, with pH near 7 and hardness around 10 to 12 grains per gallon as common targets (Bradford White For The Pro, Water Heater Anode Rods, updated July 2024).
The BradfordWhiteParts.com anode catalog sorts its September 2026 stock into magnesium, aluminum, A420, segmented and titanium rods, in both nipple and hex-head styles. The A420 label appears only as a product type there; Bradford White's public bulletin does not define it, so treat it as a part to confirm with the seller, not a spec.
Match the rod to your heater's model and serial number, not to its tank size alone. Bradford White rods differ in thread size, nipple length and overall length, and a nipple-style rod will not replace a hex-head rod. The parts store links a guide to finding both numbers for that reason.
The catalog spread shows how much variation there is. As of 16 September 2026, BradfordWhiteParts.com listed magnesium nipple rods with 2, 2-1/2, 3 and 3-1/2 inch nipples, and lengths from 9-1/2 to 51 inches. Both numbers are on the rating plate, and Bradford White's manuals ask for them with every parts order.
Bradford White sets an inspection interval, not a replacement date. Its current electric water heater manual says to inspect the anode every 2 years and replace it when needed, with more frequent checks on softened or phosphate-treated water. Replacement is due when the rod is half its original diameter or any steel core shows.
| Document | Inspection wording |
|---|---|
| Electric Water Heater manual 238-55770-00E (Aug 2026) | Inspect periodically (every 2 years) |
| Direct Vent Gas manual 238-54724-00E (Aug 2026) | Inspect periodically; local water conditions set the interval |
| Service manual 238-51542-00E (Aug 2022) | Replace at half original diameter or any exposed steel core |
The depletion test is the useful part. Service manual 238-51542-00E says replacement is recommended when depletion reaches half of the original anode diameter, given as approximately 5/8 inch, or when any of the steel core is exposed (Bradford White, service procedure RG-X). The 2-year figure comes from manual 238-55770-00E.
The service manual's procedure takes seven steps and one pipe wrench. The water in the tank can still be hot, so start by letting it cool. The steps below follow procedure RG-X in manual 238-51542-00E, which Bradford White marks for qualified service providers.
The design sets two limits. The hot outlet joint must be broken and remade, so a soldered or corroded joint turns a parts swap into a plumbing repair. And a full-length rod needs headroom above the tank to come out straight; a segmented rod is the usual answer, and Bradford White's catalog sells segmented versions.
A plumber's anode replacement runs $125 to $300 in Fixr's national figures and $150 to $350 in HomeGuide's. Both are generic, and both were last updated in August 2025. Genuine Bradford White rods cost more than the $20 to $50 part range HomeGuide assumes, so expect a quote with an OEM rod to land toward the upper end.
The price gap is visible in the September 2026 listings: the hex-head magnesium rod 415-47782-08 was $65.95 at BradfordWhiteParts.com and $131.68 at FurnacePartSource, while 415-55482-00 was $128.52 and $131.04 at Blackhawk Supply.
Fixr puts plumber time at $50 to $150 an hour in its water heater repair cost guide, updated 29 August 2025. For the general cost picture across brands, see the anode rod replacement cost guide.
Replacing the rod does not; leaving it out does. Bradford White's residential warranty excludes misuse, which it defines to include removal of the magnesium anode and the addition of non-approved components. The direct vent manual adds that removing any anode, except for inspection or replacement, will nullify the warranty.
Three other lines in the Limited Residential Water Heater Warranty, 238-39699-00ZAL (09/21) matter for this job:
Powered anodes sold as Bradford White fits are marketed as warranty-safe by their makers. The warranty text does not name powered anodes either way, so ask Bradford White's warranty group before fitting one.
The two problems Bradford White documents are rotten-egg odor and air or sputtering at the hot taps. Both come from the anode reacting with the water, not from a defect. The manuals recommend an alternative anode from your installer plus flushing the heater with a dissolver to kill odor-causing bacteria.
The third problem is mechanical. A combination outlet anode is threaded into a pipe connection that may not have been opened in years. One forum answer ranking for this topic calls the outlet anode a pain to change, though within reach of a handy owner. If the nipple will not move with a pipe wrench and steady force, stop before the tank fitting is damaged.
Bradford White's direct vent manual gives the burn times at tank temperatures: about 30 seconds at 130°F and less than 5 seconds at 140°F (Bradford White, 238-54724-00E). Its service procedure warns that heater components and stored water may be hot. Let the tank cool and open a hot tap before you drain.
| What you find | What Bradford White's documents say | Next step |
|---|---|---|
| Rod at half diameter or core exposed, tank dry | Replacement recommended (238-51542-00E) | Replace the rod |
| Smelly or cloudy hot water | Less reactive rod plus chlorination (For The Pro bulletin) | Aluminum rod and flush |
| Water leaking from the tank shell | Tank leak is a warranty matter within the tank term | See the water heater leak repair guide |
| Tank past its warranty and leaking | Labor and removal are owner costs (238-39699-00ZAL) | Price a gas water heater replacement |
| Other gas-side faults found during service | Gas control, burner and piping repairs belong to a technician | Gas water heater repair guide |
For a symptom-first view of other faults, the water heater problems hub lists repairs by cause.
Yes. The Defender Safety System service manual, 238-51542-00E, lists a "Hot Water Outlet/Anode" in its parts diagram and gives a full inspection and replacement procedure for it.
Bradford White calls magnesium the better tank protector and recommends aluminum when water is softened or low in pH, or when odor or air appears in the hot water. Match the choice to your water test, not to rod price.
No. The service manual says to drain until the water is below the outlet connection nipple, which is enough to remove the combination outlet anode without flooding the top of the tank.
Warranty 238-39699-00ZAL says the tank warranty term is found in the model number. Its own examples: RG240T6N has a 6-year tank warranty and RG240T10N a 10-year one.
Bradford White's warranty excludes the addition of non-approved components. A universal rod may fit the thread, but the safer route for a tank still under warranty is a Bradford White part matched to the serial number.
Independent Research
Published ranges for tank, tankless and heat pump replacement, the failures that justify a repair, and the ones that do not. Sourced, dated, and free to read.
