Plumbing
Fluidmaster
Fluidmaster 400H-002 Universal Toilet Fill Valve
Recommended when a toilet runs continuously or refills slowly because the fill valve no longer shuts off cleanly.
Price, rating, availability, and delivery details are shown on Amazon. Sentinel publishes those figures only after an administrator verifies them.
Most tanks accept a universal valve, but confirm tank height and shank fit before ordering.
Read why Sentinel recommends this below. Buying options are at the end of the page.
Installation difficulty
Easy
Estimated time
15 minutes
Warranty
Not applicable
Why we recommend it
Recommended when a toilet runs continuously or refills slowly because the fill valve no longer shuts off cleanly. It is most useful for surfaced with running-toilet troubleshooting and water-waste guidance.. Compatible with most tanks accept a universal valve, but confirm tank height and shank fit before ordering..
When you’ll need it
- • Before extended time away from home
- • When a fixture or supply line is over 5 years old
- • After any leak, however small
Who benefits most
- • Homes with finished basements
- • Second-floor laundry rooms
- • Homeowners who travel
Before you buy
Honest guidance — you may not need this at all
- • If your supply lines were replaced recently, inspect first — replacement may not be due yet.
Read the manufacturer's instructions once before you start — most homeowner mistakes happen in the first five minutes.
What it does
Maintenance tips
Frequently asked questions
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If this product fits your home's needs, you can purchase it through one of our trusted retail partners.
Why this matters
Spending $25–$75 today on preventive maintenance can often help homeowners avoid repairs that cost hundreds or even thousands of dollars later. Sentinel Home recommends products that support long-term home protection — not impulse purchases.
- Retailer:
- Amazon
- Last verified:
- Aug 20, 2026