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Welcome to KoolerMax online store. KoolerMax carries water related products and replacement filters for major RO systems. 

KoolerMax has over twenty years of experience in RO water industry.  We excel in providing the best quality product at competitive prices. We understand the market and we value customer satisfaction. Our office hours are Monday through Friday 9am to 4:30pm Pacific Standard Time PST. If you have any questions about our product, please feel free to contact us during business hours. However, please do not call when our office is closed. Due to the mass volume of incoming messages, we do not allow voice messages anymore. If you choose to email your question, note that all emails are responded within 1 or 2 business days at most. If you did not hear a reply after 2 business days, it's most likely that it went into spam. Please try to contact us by phone during business hours.