Warranties vary from company to company and policy to policy. Based on anecdotal evidence and conversations with people who have installed a laundry-to-landscape system, a washing machine’s warranty does not seem to be affected. If washing machines have required maintenance, the repair people have not attributed the problem to the greywater system. On newer machines the problem is usually electronic or a clogged pump filter. For individuals with existing laundry-to-landscape systems who have purchased a new machine, the company installer has disconnected and then reconnected the laundry to landscape system for them. We’ve only heard of one instance when a washer installer didn’t want to hook up the new machine to the diverter valve, saying it would void the warranty. In you have bought a new machine, make sure the connection the installer makes does not leak because they may not understand fully how the hose should be connected to the system.