Faucet Drips All Night
A single handle faucet that keeps dripping almost always has a worn cartridge inside the handle, not a worn washer at the spout. Replacing that cartridge with the matching part stops the drip at its source.
The short answer
Turn the water off, pull the old cartridge, and fit a Moen 1225B cartridge in its place, using the puller tool if the old part will not move by hand. It holds 4.6 stars from 1,596 reviews on Home Depot (November 2026), with 93 percent of reviewers recommending it. Match the old cartridge before you buy, because the right part number is the whole job.
Why does this happen?
Inside a single handle faucet, one cartridge does the work older faucets split between washers and seats. Every lift and turn wears its seals and sliding surfaces a little, and hard water adds grit and scale to that wear. Once the seal no longer closes fully, water finds the small gap that remains and leaves as a steady drip, often worse at night when household use stops and pressure in the line sits at its highest.
That mechanism explains why tightening the handle, cleaning the aerator, and replacing a spout washer rarely cure this drip for long. The leak is upstream of those parts, inside the valve itself. A new cartridge restores the original sealing surfaces in one piece, which is why plumbers reach for it first on this faucet type. So the question is not how to slow the drip. It is which cartridge your faucet takes, and you find it from the brand and by matching the part you pull out.
The fix, in order
Cheapest first, in order. When a step solves it, you are done; the product step is for the cases the free steps cannot finish.
Free step
Count the drip and name the faucet first
Watch whether the drip comes from the spout or the handle base, and note the brand marked on the faucet. A spout drip on a single handle model points to the cartridge. Photograph the faucet and any model markings before you buy anything, so you match the part at the store from evidence, not from a guess.
Free step
Shut off, drain, and pull the old cartridge out
Close the supply valves, open the faucet to release pressure, and remove the handle following the maker directions for your model. Pull the old cartridge straight out and keep it. If it will not move with steady hand pressure, do not lever against the faucet body and risk damage to the valve housing.
The product step
Fit the Moen 1225B cartridge, using the puller if it is seized
Compare the pulled cartridge with the Moen 1225B side by side for length and shape before opening the packet fully. Seized cartridges defeat hand pulling, which is the disclosed flaw in this job, so use the cartridge puller tool rather than force. Seat the new cartridge, refit the clip and handle, and restore the water slowly.
The product for this step
Moen 1225B cartridge
Habit step
Test through a full night before you call it done
Run the faucet, check under the sink for weeping at the connections, and leave a dry bowl under the spout overnight. If the bowl is dry and you hear nothing dripping in the morning, the repair worked. Keep the old cartridge until that test is done, in case a return match is needed.
The evidence, in tiers
Tier 1 · The method
The cartridge first diagnostic follows how single handle faucets are built: the cartridge is the sealing valve, so a persistent spout drip with a sound aerator and handle points to cartridge wear rather than to a washer at the outlet.
Tier 2 · This product
The Moen 1225B holds 4.6 stars from 1,596 reviews on Home Depot (November 2026), with 93 percent of reviewers recommending it.
We have not pulled a cartridge for this guide. The pull and match method follows the faucet mechanism and the maker directions for this cartridge type.
Tier 3 · What owners report
Owners report the pattern the mechanism predicts: a clean fix where the pulled part matched the replacement, and frustration where a seized old cartridge would not move by hand. That second group is why the puller belongs in the plan from the start, not as a second trip.
The alternatives, conceded where they win
| Option | What it is | The honest verdict |
|---|---|---|
| Moen 1225B cartridge with puller tool | Replacement valve cartridge matched to the pulled part | The pick: it renews the sealing surface that is actually leaking, in one part, once the match is confirmed. |
| Replacing washers and cleaning the aerator | Outlet parts and a descaled spout screen | Wins when the problem is a gritty spray pattern or a washer on an older two handle faucet; it loses here because the leak sits inside the single handle valve, upstream of both. |
| Calling a plumber to replace the faucet | Full replacement by a professional | Wins when shutoffs leak, pipes are corroded, or the brand cannot be identified; for a sound faucet with a worn cartridge it replaces far more than the part that failed. |
The honest price comparison
The honest comparison is a plumber visit to diagnose and replace a cartridge, or full faucet replacement where the body is sound. One matched cartridge and a puller let you do the working part of that visit yourself, for the cost of the parts.
Where it falls short
What follows is drawn from the product's own reviews: the complaints and failures buyers report after living with it.
- Seized cartridges defeat hand pulling: age and scale can lock the old part in the housing, which is why the puller tool is part of this recommendation, not an extra.
- The match has to be exact: a cartridge that looks close but differs in length or shape will not seal, so the pulled part is the reference, not a photograph alone.
- It cannot cure drips caused by a leaking shutoff valve, corroded pipework, or a cracked faucet body; those faults sit outside the cartridge and need different work.
- The job needs the water off and the handle dismantled, so a faucet with no working shutoff underneath turns a small job into a whole house shutoff job first.
The product, in short
Moen 1225B cartridge
Questions people ask next
How do I know it is the cartridge and not a washer?
On a single handle faucet, a steady spout drip that continues with the handle firmly off points inside the valve, where the cartridge seals. Washers belong mainly to older two handle designs, so start with brand and cartridge match on this type.
What if the old cartridge will not come out?
Stop pulling harder by hand and use the cartridge puller made for this job. Forcing the part with pliers against the faucet body can damage the housing, turning a cartridge replacement into a faucet replacement, which costs far more in time and money.
Can I buy the cartridge from a photograph alone?
A photograph helps identify the brand, but the pulled cartridge is the reliable reference for length and shape. Bring or compare the old part directly where you can, and keep the packet and receipt until the overnight test confirms the drip has stopped.
Why does the drip sound worse at night?
Night is when the house is quiet and when line pressure often sits highest because no taps are running. The gap in the worn seal passes more water under that steady pressure, so a drip that is easy to ignore by day becomes audible.
Home Depot product record for Moen 1225B cartridge (November 2026) · EPA guidance on household drips and water waste
The Fix JournalCase 29Home Systems