For an identified Delta ball-operated sink faucet, compare RP3614 for the seals and cams with RP70 for the separate lever-handle ball. A cartridge-operated faucet needs its own specified service part. Confirm the exact model drawing before ordering.
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Delta faucet parts are selected by mechanism and service number, not by brand alone. This guide focuses on the ball-faucet kit and ball assembly; the linked parts do different jobs. We compared Delta product pages with its separate repair-kit instructions, without hands-on testing.
Delta part numbers: choose by mechanism
| Part | Job | Skip for |
|---|---|---|
| RP3614 | Ball-faucet seals and cams | Self-contained cartridge |
| RP70 | Lever-handle ball | Knob-handle ball |
| RP4993 | Seats and springs in the kit | A full seal-and-cam rebuild alone |
| RP212 | Separate knob-handle ball | A lever requiring RP70 |
The purchase choices here are the genuine RP3614 kit and the separate RP70 ball. RP4993 and RP212 are identification references, not extra shopping picks. That distinction keeps you from ordering the same seals twice or assuming the repair kit includes a new ball.
A familiar handle shape is only a clue. Find the faucet’s model and its parts drawing before buying. A Delta brand name does not identify the internal mechanism. If your drawing specifies a different assembly, follow that drawing rather than substituting one of the common numbers below.
RP3614: the kit for a ball-operated sink faucet
Choose RP3614 when your identified single-handle faucet uses a ball assembly, separate seats and springs. Delta’s separate support article explicitly excludes faucets controlled by a self-contained cartridge. This is the key buying distinction: a kit of seals and cams cannot take the place of a sealed cartridge assembly.
Delta lists two seats and two springs under RP4993, two valve-body O-rings under RP25, a lever-handle cam and packing under RP61, and a knob-handle cam and packing under RP188. The kit also includes instructions and the RP1974 tool, which combines a 1/8-inch hex key and adjusting-ring spanner. Those contents explain why this can be more useful than ordering only seats and springs when several service parts are needed.
It is a candidate for the symptoms Delta names for this mechanism: dripping while off, water escaping under the handle while on, water at the spout hub while on, or stiff handle movement. These symptoms are not a guarantee that the kit will repair your particular faucet. Confirm the mechanism and the leak location first.
Skip it if the parts sheet calls for a cartridge, a hose assembly, or an unrelated body seal. The kit does not include the RP70 or RP212 ball. A ball that also needs replacement is a separate purchase, not evidence that the kit arrived incomplete.
Check Delta RP3614 repair kit on Amazon →
RP70: a separate lever-handle ball
Choose RP70 only when the exact faucet drawing calls for the lever-handle ball assembly. Delta identifies it as a stainless-steel ball for a lever handle. Its repair-kit instructions separately name RP70 and RP212 as balls that may also need replacement. The RP3614 kit supplies the service seals and cams; RP70 supplies a different component.
This makes RP70 an optional companion rather than a part everyone should add to the cart. If your existing ball is serviceable and Delta’s diagnosis calls for seals, the kit may be the only specified replacement. If the drawing calls for RP212, a lever ball is not the right alternative simply because both pieces are round.
Skip RP70 for a faucet using a self-contained cartridge, for a knob-handle faucet requiring RP212, or whenever you cannot identify the faucet. We did not find a reason to call one ball an upgrade over another. Correct geometry and the exact service number decide the purchase.
The checked Amazon listing identifies model RP70. Read the selected listing again before checkout: an aftermarket title containing the same number is a compatibility claim, not proof that Delta made the part. The link below points to the genuine Delta listing we checked.
Check Delta RP70 lever-handle ball on Amazon →
Read the kit contents before ordering seats twice
RP4993 is the seats-and-springs component listed inside RP3614. Someone who needs only those pieces should have Delta confirm that narrower repair against the model drawing. Someone rebuilding several worn service components should compare the full RP3614 contents before adding individual packages.
RP61 and RP188 also serve different handle arrangements. Their presence in one kit does not mean you install both cams together. Delta labels one for a lever and the other for a knob. Keep the drawing beside the parts and identify each piece before the faucet is apart.
The replacement ball is a different decision. Buying RP70 does not provide the new seats, springs, spout O-rings or cam assemblies listed in RP3614. Buying RP3614 does not provide RP70. Write down the required assemblies as separate lines, then check what each selected package actually contains.
For a cartridge-operated sink faucet, use our faucet cartridge guide to start identification. For a pull-out or pull-down hose problem, use the Delta hose and clip guide. Those are different repair decisions from the older ball-operated faucet parts on this page.
Before opening the faucet: model, symptom, service access
Make a short parts record: faucet model, handle type, the manufacturer’s diagram revision if shown, the exact RP number, and the package quantity. Add a photograph of the installed faucet and the location of the leak. This gives Delta support or a supply counter something more useful than a description such as an old silver faucet.
Do not use the collection name alone as a replacement-parts specification. The existing Delta kitchen faucet guide concerns complete faucets. Matching a finish or a collection photograph does not establish the internal service part for an older unit.
Delta’s RP3614 instructions begin by shutting off the water supply and covering the drain opening. Arrange reliable isolation before removing components. If the shutoffs will not isolate the faucet, the retaining parts are seized, or the faucet body is damaged, stop and have a licensed plumber assess it. A small parts order is not a reason to force a damaged assembly apart.
This guide is for selecting sink-faucet service parts. It does not cover shower-cartridge substitution or adjustment. Keep the faucet’s exact instructions with the parts, and have the person performing the repair confirm that the service procedure matches the installed mechanism.
Two instruction details that change the repair
First, Delta’s current RP3614 support instructions say to remove and discard the adjusting ring RP250 at the top of the bonnet if it is present. Do not assume every old component goes back just because it came out of the faucet. Read the instructions supplied with your kit alongside the current maker support article.
Second, Delta says not to use petroleum-based lubricants on the O-rings and instead specifies silicone-based lubricants. A lubricant chosen only because it is already in the toolbox can conflict with the manufacturer’s procedure. We have not added a separate lubricant purchase pick to this parts comparison.
The maker’s procedure also distinguishes kitchen-only spout work from other steps and requires alignment of the cam tab with the valve-body slot. Those distinctions are why this page is not a substitute for the installation sheet. If the parts in your faucet do not match the drawing, pause rather than adapting a similar-looking kit.
When a faucet still leaks after a previous repair, record which exact parts were fitted and what changed. Reordering a second generic kit before identifying the remaining leak can repeat the same mismatch. A plumber or Delta support can use that record to separate an incorrect part from a problem outside the selected kit.
Warranty and Amazon offer limits
We have not verified warranty eligibility for your faucet or separately purchased repair parts. Check with Delta before paying for parts, especially if you have the original purchase record. Do not assume a warranty supplies every component, pays a plumber’s labor, or applies to every owner and purchase channel.
On October 17, 2026, the Amazon Creators API identified both linked listings as new, in stock, with Amazon.com as the buy-box seller. Availability and the selected seller can change. Confirm the model number, condition, quantity and current seller on the destination page before checkout. We quote no price and make no promise about delivery or future stock.
We excluded look-alike compatible kits from the purchase picks. We also left the standalone RP4993 listing unlinked because the offer we checked did not establish ordinary in-stock availability. An API offer for a similarly named part does not establish compatibility with your faucet.
Frequently asked questions
Does RP3614 fit every Delta single-handle faucet?
No. Delta specifies it for faucets using a ball assembly with separate seats and springs, and excludes faucets controlled by a self-contained cartridge. Check the exact faucet parts drawing.
Does the Delta RP3614 kit include a ball?
No. Delta lists the seals, cams, O-rings and tool in the kit and separately identifies RP70 or RP212 as balls that may also need replacement. Order a ball only when your model requires it.
Are RP70 and RP212 interchangeable?
Do not substitute them. Delta identifies RP70 as a lever-handle ball and separately names RP212 in its repair instructions. Match the exact model drawing and handle arrangement.
Do I need RP4993 as well as RP3614?
RP3614 already includes the RP4993 seats and springs according to Delta’s kit instructions. Check quantities and the required repair before buying duplicate parts.
Should I put the old adjusting ring back?
For this kit, Delta’s current RP3614 instructions say to remove and discard RP250 if present. Follow the instructions for the exact kit and faucet rather than a generic reassembly video.
How we chose
We compared the maker part catalog and its separate RP3614 service document, checked the exact listing model numbers, and verified new in-stock offers. The two purchase picks were not present in the existing matching PlumbingPicks guides we opened. Warranty eligibility was not verified. Read our selection method and about Plumbing Picks.
Primary sources
- Delta RP3614 catalog page (deltafaucet.com): Exact kit identity; opened in Chrome on October 17, 2026.
- Delta RP70 catalog page (deltafaucet.com): Exact lever-handle stainless-steel ball; opened in Chrome on October 17, 2026.
- Delta RP3614 Single Handle Repair Kit instructions (support.deltafaucet.com): Separate maker document, dated February 11, 2025, opened in Chrome October 17, 2026; kit contents, exclusions, RP70/RP212 note and service instructions.