Sunrise Solar Pvt. Ltd. Manufactures Domestic Solar Water Heaters with Epoxy Coating. Sunrise Solar Pvt. Ltd. Is an ISO 9001:2000 and ISO 14001 certified company. The Domestic Solar Water Heaters with Epoxy Coating comes with 63 dia brass flanges. It has Galauminium Retainer of 1.6 mm thickness. It also has an insulation of 50 mm thick Resin bonded Rock wool. The material used for the storage tank is 304 Salem Stainless Steel with 0.8 mm thickness seam welded having sacrificial anode protection.