Request this free Tnemec Water Tank of the Year 2018 Calendar for a limited time only! Just follow the instructions below. How to get free calendar: Visit the companies website by clicking “Get This Offer (External Website)” Enter your contact and shipping information Hit “Submit” and wait for your free calendar request to process! * US Only. Limit one set per household. While supplies last. Please allow up to 10 weeks or more for delivery & processing. Samples may or may not come depending on if the company can fulfill the samples or any reason up to their discretion at all.