Map the water path
Identify the supply, treatment entry, bypass, heater and the outlets being assessed. A sample downstream of existing treatment cannot establish the untreated condition. Keep domestic and irrigation lines separate when recording results.
Use the right test
A field hardness test, conductivity meter and laboratory bacteria result answer different questions. Ask the provider which measurements are part of an equipment assessment and which require a qualified laboratory. Follow the laboratory collection and handling instructions for the test being ordered.
Compare like with like
Record date, location, operating condition and method. After service, use the agreed comparison to assess the stated treatment result. Clear appearance or a lower meter reading is not proof of every drinking-water safety question; keep the claim limited to what was actually tested.
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.