km heating and cooling plumbers do not provide warranty or guarantee for the materials and spare used for their plumbing services. We are a services provider company. We are a customer oriented company and do all help to make our customer happy. We help you in the procurement of spare parts or any required material needed for your fixing. However, this is not our business and we are not earning from this. This is merely an additional service that we provide for your convenience. So there is no question of any warranty or guarantee for the spares. The manufacturer or seller is responsible for the quality of these spare parts.