You might be surprised to learn that plumbers occasionally opt to leave an old, non-functioning shut-off valve in place and simply install a new one on the same water line. This seems counterintuitive, but there are some valid reasons why a plumber might choose this approach:
1. Minimizing Disruption and Damage
Hard-to-Reach Valves: Older homes often have shut-off valves located in tight, inaccessible spaces. Forcing a corroded or seized valve in such a situation risks damaging surrounding pipes or even causing a break, leading to a much bigger problem.
Avoiding Collateral Damage: In some cases, the old valve might be connected to fragile or brittle pipes. Attempting to remove it could cause these pipes to crack or break, necessitating even more extensive repairs.
2. Time and Cost Considerations
Expedited Repairs: Bypassing the old valve and installing a new one is often faster than trying to remove and replace the existing valve, especially if it's heavily corroded or seized. This saves time and reduces labor costs for the homeowner.
Preventing Unexpected Issues: Removing an old valve can sometimes uncover hidden problems, such as corroded pipe threads or damaged connections. This can lead to unexpected delays and additional repair costs.
3. Preserving Historical Plumbing
Antique Fixtures: In older homes with antique fixtures, the original shut-off valves might have historical value. Leaving them in place preserves the home's character and avoids the difficulty of finding replacement parts.
4. Temporary Fix or Future Plans
Short-Term Solution: If a homeowner is planning a major renovation in the future, bypassing the old valve can serve as a temporary solution until the entire plumbing system is updated.
Phased Approach: In larger buildings, bypassing a faulty valve allows plumbers to address an immediate issue without shutting down the entire water supply, minimizing disruption to other occupants.
Important Considerations
While bypassing an old shut-off valve can be a practical solution in certain situations, it's important to remember:
Proper Labeling: The old valve should be clearly labeled as "non-functioning" to avoid confusion in the future.
Accessibility: The new valve should be installed in an accessible location for easy operation.
