Water intake apparatus, namely, equipment for treating groundwater and soil comprising distribution lines, distribution manifolds, drop tubes, well seals and blowers; fittings for gas and water apparatus and pipes, namely, bibs, cocks, sink strainers, traps, valves, aerators for faucets, couplers, drains, faucet filters, shower control valves, spouts, baffles; water-softening apparatus and installations; water desalination plants; filters for drinking water; biogas generators; purification installations for sewage; cooling installations in the nature of water coolers, water cooling towers, and beverage-cooling apparatus; cooling installations for water; economisers, namely, devices for warming feed water in heating boilers; regulating and safety accessories for water or gas apparatus and pipes, namely, metered valves, pressure regulators, flashback arrestors and reverse flow check valves for gas pipes; biogas clarifying installations in the nature of biogas fermentation reactors, namely, percolating fermenters and dry fermenters; pipes and tubes being parts of hot water heating systems through which warm or high temperature circulates; coils as parts of distilling, heating or cooling installations; safety equipment for water and gas apparatus or for water and gas pipes, namely, vacuum release safety valve for flow shutoff for water and biogas plants; water-heating installations, namely, water heaters; steam valves for steam-heating installations; regulating accessories for water or gas apparatus and pipes; water-filtering apparatus; water supply installations, namely, drainage water treatment tanks, hot water tanks, waste water treatment tanks, water purification tanks; pipes being parts of sanitary facilities; water conduits installations, namely, pipes being parts of sanitary facilities, pipes for heating boilers, flexible pipes being parts of sink plumbing installations and basin plumbing installations; water softening apparatus and installations; water purification installations; water purification apparatus and machines; flushing apparatus, namely, automatic flush valves for toilets, flush levers, flushometer valves, flushometers; heat pumps; heat exchangers not parts of machines

Installation and repair of irrigation devices; drilling of wells; construction of water treatment and purification plants, solid waste treatment plants and other municipal infrastructure facilities, building construction; pipeline construction and maintenance; pump repair; plumbing; rental of earth-moving machines; underwater construction; underwater repair; heating equipment installation and repair

Geological prospecting; conducting geological surveys; engineering; construction drafting; engineering drawing