Promptech (M&E) is a mechanical and electrical firm at 1 Yishun Street 23, unit 02-29, in Yishun. Its website describes 20 years of work on pumping systems, from research and design through to development and industrial production. It says its work is built around water systems. Projects named on the website include Resorts World Sentosa, the Beauty World station on the Downtown Line, Tanjong Pagar Town Council and Changi Airport Terminal 4. The firm invites enquiries through its website. Within a kilometre there are six other plumbers on Open Locally.