sentences:  Appliances were available in small sizes suitable for a country house, pumping about 100 gallons per minute, through to large dockyard models, rated at 2000 gallons per minute.A common size, popular with Borough fire brigades, was the double vertical boiler, that could pump between 250 and 450 gallons per minute.Merryweather also provided hydrants and mains water supplies for highly vulnerable sites such as theatres, where getting a strong enough supply of water could be a problem.