Heise's Plumbing recently completed a professional running toilet repair and water hammering resolution at a residence in the historic Nob Hill neighborhood of San Francisco, California.
The Problem
The homeowner reported that their premium Toto toilet was constantly running and creating an annoying water hammering noise in the walls.
Our Inspection
Our technician arrived and performed a detailed inspection of the fill valve assembly.
Our Solution
We determined that a deteriorated fill valve diaphragm was causing both the constant water run and the pressure hammer. We replaced the faulty diaphragm with a high-grade 3.5 diaphragm kit. We also verified that the shut-off valve and supply line were functioning correctly.
Final Results
After the installation, the toilet was thoroughly tested, ran multiple flush cycles, and all work was verified for safe, leak-free, and silent operation.
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 Nob Hill
Nob Hill features mature tree landscaping and older residential construction, which can increase the risk of tree root intrusions in underground sewer cleanouts and lateral pipes.


