The model 745ASC rubber flapper swing check valve with adjustable spring closure from Flomatic Valves has an epoxy-coated, ductile iron body with encapsulated valve disc in 3- to 14-inch sizes. The valve is designed for high head, long pipe lines, multiple pump and surge tank installations. The spring closure is field-adjustable and can be replaced without removing the valve. 800/833-2040; www.flomatic.com.