DXD Swimming Pool & SPA Equipments Co., Ltd. ( Changzhou Sanding Electro-Motors & Appliances Co., Ltd.) is a manufacturer who professionally produces Hydromassage Bathtub Pumps, SPA Pumps, Swimming Pool Pumps, Sand Filters, Air Blowers and Heaters, Electronic Control Systems, and Bathtub Fittings etc. since 1998 for nearly 25 years experience.