Ftzynqur RP25513 Faucet Stem Replacement for Delta two handle Faucet Repair Kit Includes RP24096 Cartridge RP4993 Seat and Spring RP24097 Turn stop1/4, 4 pack

What this kit is and why I reached for it

I keep a small bin of common faucet repair parts in my shop. For two‑handle Delta fixtures, a cartridge plus seat-and-spring swap cures most drips and sticky handles. The Ftzynqur RP25513 kit is essentially a four‑pack of those essentials: stem cartridges with brass shafts and stainless plates, RP4993 rubber seats and springs, and 1/4‑turn stop rings. I grabbed this kit to fix a slow drip in a bathroom sink and to refresh two well‑worn kitchen handles without replacing the entire faucet.

What’s in the box

• 4 stem cartridges (brass stem, stainless plate)
• 4 rubber seats
• 4 springs
• 4 1/4‑turn stop rings

It’s a complete service set for four handles or two faucets. There are no bonnet nuts or decorative parts—plan to reuse your existing hardware.

Build quality and compatibility

The stems are appropriately machined with a brass shaft and a stainless indexing plate that feels rigid, not tinny. The molding on the rubber seats is clean, with no flash that would prevent sealing. Springs have a consistent taper and tension.

Compatibility-wise, these are the RP25513 pattern stems, used on many two‑handle Delta bathroom, kitchen, sink, and tub faucets for both hot and cold sides. If your faucet uses RP25513/RP24096 stems and RP4993 seats, this kit should fit. It won’t fit single‑handle Delta Monitor valves or non‑Delta designs. If you’re unsure, pull one stem and match the profile or check the Delta parts diagram for your model.

Installation experience

I serviced three handles: one bathroom hot side that dripped and both handles on a kitchen faucet that felt gritty and had inconsistent shutoff. Here’s how it went.

• Shutoffs and prep: I closed the angle stops and put a small bucket in the cabinet. Always check that your isolation valves don’t seep; a towel or bucket is cheap insurance.

• Disassembly: Handle off, bonnet nut off, old stem out. On all three, the old seats were flattened. Mineral buildup in the valve cavities was moderate; I cleaned with a nylon brush.

• Seats and springs: The spring goes into the valve body first, wide end down, then the rubber seat slips over the narrow end of the spring. A dab of silicone plumber’s grease helps them seat fully and prevents nicking.

• New stem install: I added a thin film of silicone grease to the stem O‑rings and the rotating seal at the bottom. The stem dropped in smoothly. Here’s a key tip: snug the retaining/bonnet nut just enough to capture the stem but do not crank it down. These assemblies are meant to “float” slightly on the springs to maintain gasket contact. Over‑tightening can cause stiffness and poor sealing.

• 1/4‑turn stop ring: I oriented the stop ring to limit travel to about a quarter turn. This keeps the handle throw short and consistent with factory feel.

• Reassemble and test: After reassembly I cracked open the shutoffs slowly to avoid blasting debris. I cycled each handle several times, then brought them to the closed position and watched for seepage. No drips initially; I left a paper towel below each valve for a few hours—still dry.

Total time per handle was 10–15 minutes with routine cleaning and careful reassembly. The kit makes the process straightforward if you’ve done Delta stems before; even for a first‑timer, this is a manageable DIY.

Performance and feel

Post‑repair, shutoff was crisp, and handle effort was smoother than before. The quarter‑turn throw feels natural for Delta’s classic two‑handle design. On the kitchen set, the previous gritty feel disappeared after replacing the seats/springs and applying silicone grease to the new stem O‑rings. No seepage at the spout overnight or in the following week.

In terms of tolerance, I noticed the bonnet nut did not bottom out as tightly on one faucet as the OEM stem had, but it still captured the assembly solidly and sealed properly. The small amount of axial float is normal and necessary for the spring‑loaded seal to work.

Practical tips for a clean repair

• Confirm the part family: RP25513 stems and RP4993 seats. Check the old parts if unsure.
• Use silicone plumber’s grease on O‑rings, the bottom seal, and lightly on the seat lip.
• Clean the valve cavity and flush the lines before final assembly—crack the shutoffs with the stem removed briefly to blow out debris, then shut and continue.
• Do not over‑tighten the bonnet nut; too much torque can distort the seal.
• Orient the 1/4‑turn stop correctly for hot/cold to limit travel.
• If a drip persists, recheck seat/spring orientation and confirm the seat is fully seated. Replace both sides for consistency.
• If you see pitting in the brass valve body seat or the spout’s mixing chamber is badly eroded, no cartridge will mask that—inspect before you blame new parts.

Where it falls short

• Not quite OEM snugness: On one of my faucets, the captured fit felt slightly looser than the original Delta stem when dry‑fitted. Functionally it sealed and operated correctly, but perfectionists may notice the difference during assembly.

• No new bonnet nuts or decorative hardware: Not a flaw, but plan to reuse or replace corroded nuts separately.

• Limited documentation: The kit doesn’t include a detailed instruction sheet. If you’re new to faucet repairs, a quick video reference helps.

• Aftermarket variability: As with any third‑party cartridge, long‑term longevity can vary. My installs have been dry and smooth so far, but only time will tell how the seals age in hard water.

Value

Four complete sets at this price point is the draw. For multi‑sink homes, rentals, or a maintenance kit on the shelf, it’s far cheaper than buying single OEM cartridges. If you only need one repair and prioritize absolute OEM fit and brand consistency, the savings are less compelling. For my use—one immediate fix and a couple preventive refreshes—the value was excellent.

Alternatives and when to choose them

• OEM Delta RP25513 and RP4993: Best if you want factory‑matched tolerances and are replacing a single handle. Higher cost per repair.

• Full faucet replacement: If your valve bodies are corroded or pitted, or if you want a design update, replacement may be smarter than repeated repairs.

• Seat and spring only: For minor drips where the stem is smooth and free of play, sometimes replacing just the seats/springs solves it. This kit includes them anyway.

Who this kit suits

• DIYers comfortable with basic plumbing who service more than one faucet
• Property managers or homeowners with multiple Delta two‑handle fixtures
• Anyone chasing drips or stiff handle rotation on compatible Delta models

If you’re unsure of compatibility or uncomfortable with spring/seat installation, you may prefer an OEM single‑repair pack with richer instructions.

The bottom line

The Ftzynqur RP25513 kit did exactly what I needed: stop a drip, restore a smooth quarter‑turn feel, and give me parts on hand for future repairs. The brass/stainless construction inspires confidence, the included seats and springs are properly molded, and installation is quick if you mind the common pitfalls—light grease, correct seat/spring orientation, and modest torque on the bonnet nut.

It’s not a perfect one‑to‑one of an OEM stem in terms of dry‑fit snugness, and documentation is minimal, but the functional result has been leak‑free and consistent in my installs. For multi‑repair value and practical performance on compatible Delta two‑handle faucets, this kit earns a spot in the shop.

Recommendation: I recommend this kit for anyone servicing multiple Delta two‑handle faucets who wants a cost‑effective, complete parts set. It’s an easy, reliable fix when installed carefully, and the four‑pack format makes sense for households or small portfolios with several fixtures to maintain. If you’re doing a one‑off repair and are particularly sensitive to OEM feel, consider the factory cartridge; otherwise, this kit is a smart buy.