Heise's Plumbing completed a professional toilet dye test and leak detection service for a homeowner in the St.
The Problem
Francis Wood neighborhood of San Francisco, CA.
Our Inspection
The customer contacted our office near the historic St.
Our Solution
Francis Wood Fountain after noticing their toilet was running constantly and causing their utility bills to rise. Our licensed plumbing technician performed a detailed dye test, placing non-toxic colored tablets into the tank to confirm if water was seeping from the tank into the bowl. We diagnosed a degraded flush valve flapper that was failing to seal, alongside a malfunctioning fill valve assembly. Our team replaced the worn flapper, installed a high-quality fill valve, adjusted the float arm, and tested the toilet's flush cycle. After finishing the repairs, we verified the leak was resolved and confirmed the toilet was operating safely and efficiently.
Final Results
If you need professional leak detection, toilet repair, or general plumbing services, Heise's Plumbing provides expert solutions throughout San Francisco and the Peninsula.
Common Signs of Toilet Plumbing Issues
If you experience any of the following, your toilet needs professional repair:
- Continuous Running: Water constantly runs into the bowl, increasing your water bill.
- Weak Flush: The toilet does not flush completely or takes multiple flushes to clear.
- Base Leaks: Water pooling on the floor around the base of the toilet.
- Loose Handle: Flashing mechanism is loose, stiff, or fails to engage the fill valve.
Toilet Repair vs. Toilet Replacement
Internal parts like flappers, fill valves, and flush levers are easy and cost-effective to repair. However, if the porcelain bowl or tank has cracks, or if the unit is extremely old and inefficient, installing a modern water-saving toilet is the better option.
Plumbing Considerations in St. Francis Wood
St. Francis Wood features mature tree landscaping and older residential construction, which can increase the risk of tree root intrusions in underground sewer cleanouts and lateral pipes.


