By Caleb MorganUpdated November 2026
Leaking tub faucet repair usually comes down to one of three worn parts: a diverter, a cup seal, or a valve cartridge. Owners who search for a fix want a kit that matches their faucet type, includes the right replacement pieces, and does not leave them guessing about sizes. The picks below were chosen on specification detail, brand reputation for the parts, and patterns in owner feedback. We did not physically test any of these items. Each one is matched to a specific repair scenario, so you can skip the products that do not fit your faucet.
Our top picks at a glance
- 1
TOP CHOICEBest overallEnhon 2 Set Tub Spout Diverter Repair Kit (Chrome, Classic)View on Amazon - 2
TOP CHOICEBest for universal fixesFaucet Washers and Sealing Gaskets 1075 PCS Universal Plumbing Repair KitView on Amazon - 3
TOP CHOICEBest for Moen 3800 tub spoutsTap Accessories 101237 Cup Seal and Diverter Gate Set for Moen 3800 Tub SpoutView on Amazon - 4
Best budget pickBathtub Spray Diverter Repair Kit Chrome Diverter Stem SetView on Amazon - 5
Best for multiple bathrooms6 Sets 101237 Tub Spout Repair Kit Moen-3800 Cup Seal and Diverter GateView on Amazon - 6
Best for Delta single-handle cartridgesDanco Cartridge Repair Kit for Delta Single-Handle Faucet (86970)View on Amazon - 7
Best for a spare-parts stash101237 Cup Seal Diverter Gate 3 Pack for Moen 3800 Tub SpoutView on Amazon
Our Top Picks
Quick Comparison
| Product | Best for | Key feature |
|---|---|---|
| Enhon 2 Set Tub Spout Diverter Repair Kit | Overall diverter leaks | Two stems, cup seals and gates |
| Universal Plumbing Repair Kit (1075 PCS) | Mixed household leaks | 37 washer and gasket sizes |
| 101237 Cup Seal and Diverter Gate Set (5 Pcs) | Moen 3800 tub spouts | Matched cup seal and gate |
| Chrome Bathtub Spray Diverter Repair Kit | Budget single fix | Complete diverter stem set |
| 6 Sets 101237 Tub Spout Repair Kit | Multiple bathrooms | Six sets in one order |
| Danco Cartridge Repair Kit (86970) | Delta single-handle tub valves | Brass cartridge kit |
| 3 Pack 101237 Cup Seal Diverter Gate | Keeping spares on hand | Three matched sets |
Enhon 2 Set Tub Spout Diverter Repair Kit (Chrome, Classic)
Includes 2 x Diverter Valve Stems, 2 x Cup Seals and 2 x Gates, Bathroom Shower Bathtub Leaky Faucet Repair Replacement Parts Enhon 2 Set Tub Spout Diverter Repair Kit (Chrome, Classic)
Best for: Overall diverter leaks where water keeps coming from the spout when the shower is on.
This kit suits homeowners who are not yet sure which part has failed. Including two stems, cup seals and gates gives you a second set if the first one does not seat correctly.
Key specs
- Includes 2 diverter valve stems
- Includes 2 cup seals and 2 gates
- Chrome finish, classic style
Pros
- Covers the three most common diverter wear points
- Spare set reduces the chance of a second trip to the store
- Chrome finish is a reasonable visual match for many tub spouts
Cons
- Fit depends on matching your spout design before you open the package
- Some owners report the stems need a light trim to seat smoothly
Bottom line: A strong first choice for a leaking tub spout diverter when you want several parts in one order.
Faucet Washers and Sealing Gaskets 1075 PCS Universal Plumbing Repair Kit
Faucet Washers & Sealing Gaskets to Fix Leaky Faucets, Hoses, Spigots, Plumbing Fixtures with Pick Hook 1075 PCS 37 Sizes 3-in-1 Universal Plumbing Repair Kit & O-Rings
Best for: Mixed household leaks where you need washers and O-rings for more than one fixture.
This kit is aimed at people who maintain several faucets, hoses and spigots. The large assortment means you can often find a size match without a second purchase, though it is less targeted than a dedicated tub kit.
Key specs
- 1075 pieces across 37 sizes
- Includes a pick hook for removing old washers and O-rings
Pros
- Wide size range covers many faucet types
- Useful for hoses and outdoor fixtures as well
- Pick hook makes removal easier
Cons
- Not designed for diverter-specific or cartridge repairs
- Sizing still requires measuring the old part carefully
Bottom line: Best for a homeowner who wants one bin of parts for many repairs, not a single tub fix.
Tap Accessories 101237 Cup Seal and Diverter Gate Set for Moen 3800 Tub Spout
Tap Accessories, Plastic & Rubber, Bathroom, Sink Faucet Parts, Plumbing Fixture, Shower Repair Replacement Parts 5 Pcs 101237 Cup Seal & Diverter Gate for Moen 3800 Tub Spout
Best for: Moen 3800 tub spout diverter leaks where the cup seal and gate have worn out.
If your tub spout is a Moen 3800 style, this set targets the exact wear points that cause water to leak from the spout instead of the shower head.
Key specs
- 5 pieces in the 101237 configuration
- Rubber cup seal and diverter gate
Pros
- Matches a common tub spout model directly
- Rubber and plastic construction is suited to the diverter location
- Simple parts list for a quick repair
Cons
- Only fits Moen 3800 style spouts, so it is limited in scope
- Seal quality varies by batch according to some owner reports
Bottom line: Pick this if you have confirmed a Moen 3800 spout and only need the seal and gate replaced.
Bathtub Spray Diverter Repair Kit Chrome Diverter Stem Set
1 Set Bathtub Spray Diverter Repair Kit Chrome Diverter Stem Cup Seal Gate One each Bathroom Shower Tub Leaking Faucet Repair Replacement Parts
Best for: A budget single fix for a diverter that leaks when the tub spout is in use.
This set provides one of each core diverter part, making it a practical option for a single bathroom with one tub.
Key specs
- One diverter stem, one cup seal and one gate
- Chrome finish
Pros
- Complete set for a single repair
- Straightforward parts list
- Works well as a first attempt before buying a higher-end kit
Cons
- No spare parts if the first install is not right
- Compatibility should be checked against your spout design
Bottom line: A sensible choice for a single leaking tub spout when you want to keep costs modest.
6 Sets 101237 Tub Spout Repair Kit Moen-3800 Cup Seal and Diverter Gate
6 Sets 101237 Tub Spout Repair Kit – Moen-3800 Cup Seal & Diverter Gate Replacement Set for Plumbing Fixture & Faucet, 3800 Tub Spout Diverter Repair Kit for Bathtub/Shower Faucet
Best for: Households with several tubs or rental units that use the same Moen 3800 spout.
Buying six sets in one order makes sense when you manage multiple bathrooms or want to keep spares on hand for future leaks.
Key specs
- 6 sets of cup seal and diverter gate
- Designed for Moen 3800 style tub spouts
Pros
- Useful bulk quantity for multiple tubs
- Consistent parts across all sets
- Good for property managers or DIY owners with spares
Cons
- Most buyers only need one or two sets
- Limited to one spout style
Bottom line: A practical bulk option for anyone repairing several Moen 3800 spouts.
Danco Cartridge Repair Kit for Delta Single-Handle Faucet (86970)
Faucet Repair Kits, Cartridge Repair Kits, Faucet Cartridges, Single Handle Faucets, Brass/Plastic/Rubber/Steel Danco Cartridge Repair Kit for Delta Single-Handle Faucet, Brass (86970)
Best for: Delta single-handle tub and shower valves that drip or leak at the handle.
When a single-handle tub valve drips even with the handle off, the cartridge is often the cause. This kit is aimed at that specific repair.
Key specs
- Brass cartridge repair kit
- Listed for Delta single-handle faucets, model 86970
Pros
- Targets the cartridge rather than only the seals
- Brass construction is durable for valve parts
- Well known within the Delta repair category
Cons
- Only useful if your valve is a compatible Delta single-handle type
- Not a fix for diverter spout leaks
Bottom line: The right pick for a dripping Delta single-handle tub valve when the cartridge is the culprit.
101237 Cup Seal Diverter Gate 3 Pack for Moen 3800 Tub Spout
Rubber plastic combo, leakproof seal, easy faucet repair install 3 Pack 101237 Cup Seal Diverter Gate Fit Moen 3800 Tub Spout Repair Parts
Best for: Keeping matched spare parts on hand for Moen 3800 tub spouts.
A three-pack gives you a repair ready for the next leak without another order, which suits homeowners who expect periodic wear.
Key specs
- 3 packs of 101237 cup seal and diverter gate
- Rubber and plastic construction
Pros
- Good for keeping spares in a drawer
- Matched seal and gate reduce guesswork
- Easy to install with basic tools
Cons
- Fits only Moen 3800 style spouts
- Does not include a diverter stem
Bottom line: A good stash item for anyone who already knows their spout is a Moen 3800 and wants backups.
Buying Guide
Identify whether the leak is at the spout or the valve
Before buying any kit, turn the shower on. If water comes from the tub spout, the diverter is the likely cause. If it drips from the handle or wall with the water off, check the cartridge or valve stem. Choosing the wrong part wastes time, so confirm the leak path first. Consult a licensed plumber if you cannot locate the source or if you suspect hidden water damage behind the wall.
Good picks for this: Enhon 2 Set Tub Spout Diverter Repair Kit, Danco Cartridge Repair Kit for Delta (86970)
Match the brand and model of your faucet
Diverter parts are not interchangeable between manufacturers. Look for a model number stamped on the spout, the handle, or the inside of the valve escutcheon. Brand-specific kits such as the Moen 3800 parts listed here are designed around those dimensions, so an exact match matters more than a large parts count.
Good picks for this: 101237 Cup Seal and Diverter Gate Set for Moen 3800, 101237 Cup Seal Diverter Gate 3 Pack
Check the size and fit of seals and gaskets
Measure the old washer or O-ring with calipers or a ruler. Seals that look similar can differ by a few millimeters, and that difference is enough to cause a persistent leak. A wide-assortment kit helps when you are unsure of the size, but you still need to test fit each part before final assembly.
Good picks for this: Universal Plumbing Repair Kit (1075 PCS), 6 Sets 101237 Tub Spout Repair Kit
Consider the use case: single fix or multiple repairs
A single-bathroom homeowner usually needs one set of parts. Landlords, property managers and people with several tubs benefit from multi-pack options. Buying in bulk lowers the chance of repeating the trip to the store, but it only makes sense if the parts match all your fixtures.
Good picks for this: Chrome Bathtub Spray Diverter Repair Kit, 6 Sets 101237 Tub Spout Repair Kit
Evaluate material and durability
Brass cartridges and rubber or silicone seals tend to hold up better under repeated hot and cold cycles than thin plastic alternatives. Owner feedback commonly notes that rubber cup seals wear faster when they are installed dry, so lubricating with plumber’s grease is a useful step. Check whether the kit lists its materials clearly before you buy.
Good picks for this: Danco Cartridge Repair Kit for Delta (86970), Enhon 2 Set Tub Spout Diverter Repair Kit
Look for complete versus partial kits
Some listings include only a cup seal and gate, while others add a stem and extra seals. A complete kit saves a second order if the stem is also worn. Partial kits are cheaper but can leave you short if the diverter stem is the real failure point.
Good picks for this: Enhon 2 Set Tub Spout Diverter Repair Kit, 3 Pack 101237 Cup Seal Diverter Gate
Plan for care and future repairs
Once the repair is done, run the tub spout for a few minutes to flush debris, then recheck for drips over the next day. Keep one spare set of the part that failed, since diverter components wear at similar rates in the same fixture. If leaks return within a few weeks, the valve body may be damaged and a full replacement may be the better option.
Good picks for this: 3 Pack 101237 Cup Seal Diverter Gate, 6 Sets 101237 Tub Spout Repair Kit
FAQ
How do I know if my tub faucet needs a cartridge or a diverter repair?
If water leaks from the tub spout while the shower is running, the diverter is usually the cause. If the handle drips or water leaks with the faucet fully off, the cartridge or valve stem is more likely. Test both by running the shower and checking the spout first.
Can I use a universal repair kit on any tub faucet?
Universal kits include many sizes of washers and O-rings, which can work on many fixtures. However, diverter stems and cartridges are brand-specific, so a universal kit is best for seals and gaskets, not for complete valve replacement.
Do I need to shut off the water before repairing a tub faucet?
Yes. Shut off the water supply at the isolation valves or the main shutoff before removing any handle, stem or cartridge. Open the faucet briefly afterward to relieve any remaining pressure.
Why does my tub spout keep leaking after I replaced the cup seal?
The most common cause is an incorrect size or a cup seal installed without lubrication. Check that the gate and stem seat fully, and confirm the part number matches your spout model. If the leak continues, the diverter stem or valve body may also be worn.
How long does a tub faucet repair usually take?
For a straightforward diverter or cup seal replacement, many homeowners finish in under an hour with basic tools. Cartridge replacements can take longer, especially if corrosion makes parts difficult to remove. Plan for extra time if this is your first repair.
When should I call a professional plumber?
Call a licensed plumber if you see water stains in the wall or ceiling, if the valve body is cracked, or if the leak continues after two repair attempts. Hidden leaks can cause structural damage, so a professional inspection is a sensible step.
Conclusion
For most leaking tub spouts, start by confirming whether the diverter or the valve cartridge has failed. The Enhon 2 Set Tub Spout Diverter Repair Kit is a strong general choice for diverter leaks, while the Moen 3800 cup seal and gate sets fit that specific spout style directly. For Delta single-handle valves that drip at the handle, the Danco 86970 cartridge kit is the more relevant pick. Homeowners who maintain several fixtures may prefer the universal assortment, and anyone who already knows their spout model can keep spares on hand with a three-pack. Matching the kit to your faucet type matters more than choosing the largest parts count.
For more step-by-step guidance, see Repair Tub Faucet Drip: A Step-by-Step Guide to Stop Leaks (2026), Moen Tub Faucet Cartridge: Step-by-Step Replacement Guide (2026), and Repair Delta Tub Faucet: 7 Best Kits and Parts Compared (2026).
Sources
- Guidance on household water use and identifying leaks that waste water at home (epa.gov)
- Consumer safety information on water heater and bathroom fixture hazards (cpsc.gov)
- Standards and certification information for plumbing fixtures and components
Related reading
- Leaky Tub Faucet Repair: 7 Best Kits and Parts Compared (2026)
- Leaking Outdoor Faucet Repair: 5 Best Kits Compared (2026)
- Delta Soaker Tub Faucet: How to Choose, Install and Repair One
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.
