An unloader valve works by diverting water flow into a bypass as soon as a trigger gun valve is closed. These two valves work together to create a unique system that directs water into a float tank or a pump inlet. Unloader valves are used to circulate water into the inlet side of a pump, while trigger gun valves control the flow of water.Continue Reading
There are two types of unloader valves: the pressure-actuated unloader and the flow-actuated unloader. The pressure-actuated unloader works by responding to increases and decreases in water pressure. The flow-actuated unloader relies completely on water flow; a halt in water flow increases the internal pressure.
Most unloaders are designed to function with 5 to 10 percent of water flow in the bypass at all times. This is true for all pressure-actuated unloaders. These types of unloaders usually need at least 10 percent of water capacity in the bypass. The water in the bypass provides a type of cushion between the valve ball and the seat to help lessen the impact of two metals being forced together during normal valve operations.
No machine that uses unloaders should run in a bypass mode continuously. This is because the closed loop rapidly increases the temperature of the water. Most water pumps are not designed to handle water that gets hotter than 140 degrees Fahrenheit.Learn more about Plumbing
While showers are generally dependable, a malfunctioning diverter valve on a tub-shower combination prevents changing the water from the tub spout to the showerhead. Installing a new, low-flow showerhead with an older diverter valve sometimes causes problems. Replacing the tub spout with a new one usually fixes either problem.Full Answer >
Flushing toilets use gravity and an increase in the height of water in the bowl when the user activates the flush valve to move water and waste through an "S-bend" into a drain pipe and out of the home. These simple devices have relatively few moving parts and, in most cases, offer many years of trouble-free service.Full Answer >
A diverter tub spout works by blocking off the flow of water to the tub spout. This forces the water to the shower head instead.Full Answer >
To turn the bypass off, simply turn the valve levers into the open position, which is usually vertical. When the bypass is on, this prevents the water softener from using water. This prevents water from being wasted during certain times, such as watering the lawn.Full Answer >