I purchased Usha monobloc self priming 1 HP pump model Optima-II-Trendy. It is VERY NOISY. The pump was immediately attended several times by Usha CCare toll-free 1800-1033-111, but it got more & more noisy. Though there is service for a year by Usha, but the consumer has to exert again & again for getting attended the complaints and has to face mental torture, even after investing a fair price. The quality of Usha pumps seems MOST UNSATISFACTORY & HATED. A company like Usha who earn a good name in consumer products, should introduce a model only after its rigid checking.