By Caleb MorganUpdated November 2026
The delta faucet repair kit rp4993 is a parts kit designed for specific Delta faucet models, and it replaces the internal components that most often cause drips, leaks and stiff handles. This guide explains what the kit typically contains, how to confirm it matches your faucet, and how to complete a basic repair. Most of the work takes under an hour with a few common hand tools.
Confirm the RP4993 Kit Matches Your Faucet
Before you buy or open anything, check that your faucet is compatible. Delta uses part numbers to group internal components, so the kit number matters more than the faucet’s finish or handle style. Look for the model number stamped on the faucet body, under the spout or on the included installation sheet, then compare it against the compatibility list on the packaging or Delta’s parts lookup. If the number does not match, the cartridge or seats may be the wrong size and the repair will fail.
Shopping for one? See our guide: Delta Bath Faucet Repair: 5 Best Repair Kits Compared (2026).
Gather Tools and Shut Off the Water
Plan the job so you are not stopping halfway through. Most repairs need only a few items, and having them ready avoids scratched finishes and lost screws.
- Adjustable wrench or basin wrench, wrapped in tape or a cloth to protect the finish
- Phillips screwdriver and a flat-head screwdriver
- Allen wrench set (Delta often uses a hex screw on the handle)
- Plumber’s grease, a small tub
- Clean rags and a bowl for the small parts
Close the shutoff valves under the sink. If your faucet has no accessible valves, shut off the main water supply. Open the faucet to drain remaining water and relieve pressure.
Remove the Handle and Cartridge
Pry off the decorative cap on the handle, then remove the handle screw. Lift the handle straight up. Next, unscrew the retaining nut or clip that holds the cartridge in place. Pull the old cartridge out with a gentle, steady motion. If it sticks because of mineral buildup, a small amount of white vinegar on a cloth can loosen the deposits before you pull again.
Inspect the Seats and O-Rings
Before installing the new parts, check the valve seats at the bottom of the faucet body. Look for pitting, grit or flaking. Clean them with a cloth and remove any debris. Replace the O-rings included in the kit, and coat them lightly with plumber’s grease so they seal and slide smoothly.
Install the New Parts and Test the Faucet
Seat the new cartridge with the alignment tab facing the same direction as the old one. Secure it with the retaining nut, but do not overtighten, since cracked plastic is a common result. Reattach the handle, tighten the screw, and snap on the cap. Restore water slowly, then turn the handle through its full range. Watch for leaks at the base and the spout. Run both hot and cold to confirm the mixing works and there is no drip when the handle is off.
Recommended gear
- Plumber’s grease helps O-rings seal and keeps the cartridge moving smoothly. View on Amazon
- A basin wrench reaches the retaining nut in tight cabinet spaces where a standard wrench cannot. View on Amazon
Common mistakes
- Ordering the kit without checking the model number, which leads to the wrong cartridge size.
- Skipping the shutoff valves and getting soaked when the cartridge comes out.
- Overtightening the retaining nut, which can crack the plastic body.
- Reusing old O-rings that have hardened or flattened.
- Installing the cartridge with the alignment tab facing the wrong way, which causes hot and cold to reverse.
If you want to compare how this kit fits with other repair options, see Delta Faucet Repair Kits: How to Choose and Use the Right One and Delta Single Handle Faucet Repair Kit Review: Features and Performance. For a related guide on a different Delta fixture, Delta Bathtub Faucet Repair Kit: Step-by-Step Fix for Leaks and Drips covers similar steps.
FAQ
Will the delta rp4993 faucet repair kit fit every Delta faucet?
No. The kit is designed for specific Delta models, so check the model number on your faucet against the compatibility list before buying.
How long does the repair usually take?
Most homeowners can finish a basic cartridge replacement in under an hour, though stuck parts or corroded fittings can add time.
When should I call a plumber instead?
If the faucet body is cracked, the water supply lines leak, or the valves under the sink will not shut off, stop and consult a licensed plumber.
Conclusion
The delta faucet repair kit rp4993 can stop drips and restore smooth handle action when the model matches. Confirm compatibility first, shut off the water, and replace the seals and cartridge carefully. A methodical repair usually solves the problem in a single afternoon.
Related reading
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About Caleb Morgan
Caleb Morgan is part of our editorial team and reviews and edits our kitchen faucets & sinks guides, checking product details against manufacturer specifications and owner feedback.
