Delta RP46463 Cartridge Assembly,
✅ PROS
- Drops into any Delta two-handle faucet — no specialized tools beyond a hex key and pliers
- Nylon housing with brass stem resists mineral buildup better than older plastic-only versions
- Consistent water flow with no chattering or pressure loss even at 60 PSI
❌ CONS
- Only fits Delta faucets — universal brands like Moen or Pfister need their own cartridges
- No o-rings or grease included; you'll buy a tube of faucet grease separately
The Verdict
A dripping faucet isn’t just annoying — it’s literally money going down the drain. A single leaky hot water handle can waste thousands of gallons a year. That’s where the Delta RP46463 cartridge assembly comes in. This is the replacement part for virtually every two-handle Delta faucet made since the 1990s, and at roughly $20, it’s the cheapest fix you’ll find short of calling a plumber (who’ll charge you $150 minimum).
What’s in the Box
You get one cartridge assembly — the complete stem, brass valve, and nylon housing unit that slides into your faucet body. That’s it. No o-rings, no grease, no instruction manual. The packaging is minimal and functional. The cartridge itself is well-machined with a solid brass stem that threads cleanly into the handle. The nylon body has the distinct shape Delta has used for decades, so it’s instantly recognizable if you’ve done this before.
Performance and Build Quality
The RP46463 is a genuine Delta OEM part, not an aftermarket knockoff. That matters. The tolerances are tight — it seats firmly in the faucet body without wobble, and the stem travels smoothly through its rotation with a satisfying, precise click at each stop. The internal rubber seals are properly vulcanized, not just glued in place like some cheaper third-party versions.
Installation is straightforward if you’ve got basic DIY skills: shut off the water, remove the handle screw, pull the old cartridge with pliers, and push the new one in. The whole job takes 15 minutes. One buyer noted, “Took longer to find my hex wrench than to actually swap the cartridge. Drip stopped immediately.” Another said, “I’d never done plumbing before and this was embarrassingly easy.”
What buyers consistently praise is the longevity. Multiple reviewers report the cartridge performing flawlessly for two-plus years with no degradation in flow rate or temperature control. The nylon housing doesn’t corrode, and the brass stem shows no signs of wear even in hard-water homes.
Where It Falls Short
Here’s the honest truth: this cartridge only works on Delta faucets. If you’ve got a Moen, Kohler, or Pfister fixture, this won’t fit — and you’ll be returning it. Check your faucet brand before ordering.
The other gripe is that Delta doesn’t include o-rings or plumber’s grease in the box. You’ll need to buy a small tube of silicone faucet grease (about $5) to properly lubricate the new o-rings during installation. It’s a minor annoyance, but it’s an extra trip to the hardware store if you don’t have any on hand.
Who Should Buy This
- DIY homeowners with a dripping Delta two-handle faucet — this is your fix
- Landlords and property managers who maintain multiple units with Delta fixtures (buy a few in bulk)
- Anyone tired of paying plumber call-out fees for a 15-minute job
Skip it if you have a single-handle faucet (those need a different cartridge) or if your faucet isn’t Delta.
FAQ
Q: How do I know if my faucet takes this cartridge? A: Measure the stem — the RP46463 fits Delta two-handle faucets with a 1.5-inch cartridge. If your faucet says “Delta” on the base or handle, there’s roughly a 90% chance this is the right part.
Q: Can I install this without shutting off the main water supply? A: No. You must shut off the water — either the shutoff valves under the sink or the main supply. Skipping this step means a mini flood in your cabinet.
Q: Will this fix low water pressure in one handle? A: Yes, if the low pressure is caused by a worn cartridge. If the issue is sediment in your pipes, you’ll need to flush the lines first.
The Verdict
Buy it if: You have a leaking Delta two-handle faucet and want a permanent fix that takes less time than waiting for a plumber.
Skip it if: Your faucet isn’t Delta, or you’re dealing with a single-handle model.
The Delta RP46463 is the right part at a fair price, backed by 4.5 stars across 225 ratings. It does exactly what it claims, installs cleanly, and solves the problem for years. The lack of included grease and the Delta-only compatibility keep it from a perfect score, but for its intended purpose, this cartridge is about as good as replacement parts get.
Rating: 4.6/5 — Highly recommended for Delta faucet owners.
Where to Buy
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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.