Equivalent system means we will try, as far as possible, to match on a like-for-like basis the system or package you have been offered. For example, if you have been quoted a 600-Litre system with 4040HF5 Reverse osmosis and twin 7-Litre DI vessels, we will be able to match that system almost exactly. (The price match applies only to our standard hard and soft water systems, not to the V4-P).