Usha International Limited offers Spectrum Water Heater with Built-in Pressure Relief Valve. Usha International Limited is certified ISO 9001:2000 for its marketing practices. These water heaters are available under Usha International Limited Lexus Series. Spectrum Water Heater with Built-in pressure relief valve features shock-proof engineering ABS plastic body. Manufactured in an ISO 9001 certified factory, these water heaters are certified by BIS as per IS: 2082. Usha International Limited offers two year warranty on this product and five year warranty on the tank. Available in White and Ivory colors, the Spectrum Water Heater includes external temperature control [only in 1.5L and 2.5L models], automatic thermal cut-out and fusible plug. It also has PUF insulation, non-corrosive hardware, three pin plug and copper tank and internals.