A noisy or slow-filling toilet in your Derwood home usually points to the fill valve. Here's what to know about replacing it.
Signs of a failing fill valve
- Water keeps flowing into the overflow tube
- Tank doesn't fill to the proper level
- Toilet won't stop running even with a new flapper
- Leak at the base of the fill valve under the tank
- Hissing or whistling after the tank is full
- Tank takes a long time to refill
Why fill valves wear out
Minerals and debris in water wear the seals inside the valve. Over time it can't shut off fully, or it opens slowly. Replacing the entire valve is usually faster and more reliable than rebuilding it.
Derwood homes: what we see
Many Derwood homes from the '80s–'90s have fill valves that have been rebuilt more than once. A full replacement is the cleaner fix.
Most Derwood homes are on WSSC Water, which licenses plumbers in its service area and runs the cross-connection (backflow) program.
Getting the water level right
After install, we set the water level about an inch below the top of the overflow tube (or to the line marked on the tank). Too high and it runs into the overflow; too low and the flush is weak.
Check the supply line too
If the supply line is old or the shutoff valve is stiff, we recommend replacing them at the same time. It's a small cost to prevent a flood from a failed plastic nut.
How HiTrend handles toilet fill valve jobs in Derwood
- Tell us what you're hearing
- Diagnose fill valve and flush components
- Written price
- Replace valve and adjust water level
- Test for quiet, complete refill
Quick check
Lift the tank lid and watch after a flush. If water keeps flowing into the overflow tube after the tank is full, the fill valve or float is set too high or failing. Turn the shutoff valve off until it's fixed.
Serving Derwood neighborhoods
We handle toilet fill valve service throughout Derwood, including Derwood Station, Mill Creek Towne, Redland, and the area around Rock Creek Regional Park (ZIP 20855). Also nearby: Toilet Fill Valve in Montgomery Village, Toilet Fill Valve in Washington Grove, Toilet Fill Valve in Colesville, Toilet Fill Valve in Laytonsville.
Frequently asked questions
Should I replace the flapper too?
If it's old, yes. Replacing both together often fixes a running toilet completely.
Can water pressure affect the fill valve?
Yes. Very high pressure can make valves noisy and wear them faster. We can check your pressure.
What's a ballcock?
An older style of fill valve with a float ball on an arm. Modern valves use a float cup.
Is a running toilet an emergency?
Not usually, but it wastes water. Turn off the shutoff valve until it's fixed.