Waste lines from a sewage ejector or sump pump use a check valve to stop wastewater from flowing back into the basin. When ...

Anyone could have bought an off-the-shelf solenoid valve, not [Valentin], he designed his own. It is simple and just pinches the water supply tube to stop the flow of water coming from the ...

Scientists have designed a novel control approach for water-to-water heat pumps that use carbon dioxide. They relied on a ...