Find what has changed
Describe whether taste returned gradually, pressure dropped after a cartridge change or an older tank has an unknown media history. Those patterns call for different work. Record the valve model and last service rather than assuming a larger tank is the answer. Ask whether a repair or media service can restore performance.
Compare the replacement scope
A replacement quote should identify media, usable flow, plumbing changes and removal of old equipment. The outside appearance of two tanks can be similar while the treatment targets differ. Match any reduction claim to documentation for the exact proposed model and operating conditions.
Keep the before-and-after evidence
Agree on how the result will be checked and when it will be checked again. Keep startup measurements and the service schedule with your household records. A fresh cartridge or tank does not prove that a separate softener, water heater or dedicated drinking system is operating correctly.
House, additional buildings and private-well boundaries
For a Wellington request, identify the supply serving each building before discussing equipment. A household connected to municipal water differs from a house on a private well, and a barn or irrigation line may be a separate scope. List the affected outlets and the demand the proposal is expected to serve. Do not apply a domestic equipment recommendation to animal-care or other specialist uses without the relevant professional guidance. A written line map helps the provider assess the correct project.