Automatic swimming pool and spa cleaning and circulation system comprised of pop-up water circulation nozzles and water flow control valves; pop-up water circulation nozzles and water flow control valves sold as a component part of automatic swimming pool and spa cleaning systems

Automatic swimming pool and spa cleaning and circulation system comprised of pop-up nozzles and water flow control valves; pop-up nozzles and water flow control valves sold as a component part of automatic swimming pool and spa cleaning systems