Located on Washington Street in Claremont. Twin State Pool, Spa & Billiards is a family owned and operated small business located on Washington Street in Claremont, NH. We have everything you need to enjoy your pool or spa this summer. Customers are welcome to stop in the store with a water sample for FREE computerized water testing, using our new top of the line Waterlink Spin Professional Water Analysis Lab. We'll be happy to help you keep your pool clear and worry-free. We can also add water or fill your pool.