If your toilet won’t stop running or leaks from the tank, the culprit is often a faulty fill valve. While many homeowners choose to replace it themselves, you may be wondering: how much does it cost to hire a plumber to replace a fill valve? In this guide, we’ll break down typical costs, what factors affect pricing, and whether it’s worth hiring a professional or doing it yourself.
Average Cost to Have a Plumber Replace a Fill Valve
On average, hiring a plumber to replace a toilet fill valve will cost between $120 and $250. This estimate includes:
- Service call fee: Many plumbers charge $50–$100 just to come out.
- Labor: Replacing a fill valve takes about 30–60 minutes. Plumber labor rates average $75–$150 per hour depending on your location.
- Parts: A new fill valve typically costs $15–$40, though a plumber may charge slightly more for providing the part.
If your plumber bundles the service, expect a flat rate of around $150–$200 in most areas.
Factors That Affect the Cost
Not all plumbing jobs cost the same. Here are a few things that can increase or decrease the total price:
- Location: Big cities with high labor costs may run closer to $250+, while small towns may be closer to $120.
- Emergency or after-hours service: Weekend or evening calls can add $50–$100 to the bill.
- Multiple toilets: If you have more than one valve to replace, many plumbers will discount the per-toilet price.
- Extra repairs: If the shutoff valve, flapper, or supply line also needs replacement, the cost goes up.
DIY vs. Hiring a Plumber
Should you hire a plumber or tackle the job yourself? Let’s compare:
Hiring a Plumber
- Pros: Guaranteed repair, no risk of mistakes, time savings.
- Cons: Costs significantly more than doing it yourself.
DIY Replacement
- Pros: Saves $100–$200, easy with basic tools, many valves are designed for DIY install.
- Cons: May take longer if you’re inexperienced, risk of leaks if installed incorrectly.
For most homeowners, replacing a fill valve is one of the easiest plumbing DIYs. If you’re comfortable with a wrench and can follow directions, you can likely handle it yourself.
Recommended Fill Valve Replacements
If you decide to do the job on your own, here are some top-rated fill valves that work with most toilets:
Fluidmaster 400A Universal Toilet Fill Valve
- Fits most toilets, adjustable height.
- Industry-standard replacement.
- Affordable and widely available.
Korky QuietFILL 528MP Toilet Fill Valve
- Quiet refill design — great for bathrooms near bedrooms.
- Tool-free installation and adjustment.
- Durable construction with universal compatibility.
Fluidmaster 400CRP14 Complete Toilet Repair Kit
- Includes both fill valve and flapper.
- Great option for older toilets with multiple worn parts.
- Restores full flushing performance.
Comparison Table
| Model | Best For | Key Features | Price |
|---|---|---|---|
| Fluidmaster 400A | Everyday use | Universal fit, adjustable height | Check Price |
| Korky QuietFILL 528MP | Quiet operation | Tool-free, noise reduction | Check Price |
| Fluidmaster 400CRP14 Kit | Complete repair | Fill valve + flapper | Check Price |
FAQ
- Can I replace a fill valve myself?
Yes, most replacements take under 30 minutes with basic tools. - How long does a fill valve last?
On average, 5–7 years depending on water quality and usage. - Will a plumber warranty their work?
Many plumbers provide a short warranty (30–90 days) on parts and labor. - What if my toilet still leaks after replacement?
The flapper or flush valve might also need replacement — a plumber may recommend a complete repair kit.
Conclusion & Call to Action
Hiring a plumber to replace a toilet fill valve usually costs between $120 and $250. While that’s not outrageous, it’s far more than the $15–$40 cost of the part itself. If you’re handy with basic tools, replacing the fill valve yourself can save you significant money. For those who prefer peace of mind, calling a plumber ensures the job is done quickly and correctly.
Want to save on repair costs? Pick up a proven fill valve like the Fluidmaster 400A or the Korky QuietFILL and handle the replacement yourself — it’s one of the easiest DIY plumbing jobs you can do.