A valve in physics and engineering is a device used to control the flow of a fluid inside an enclosed space, such as a pipe. A foot valve is a strainer combined with a check valve (one way valve). Air will find its way into the pipe. BC Series Check Valves. As such, they allow only an unidirectional flow, and close off when the direction of flow gets reversed. Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. If the foot valve is more than about 30' deep, the resulting vacuum will cause the water to boil away, leaving nothing in the upper part of the pipe. Foot valves are a type of check valve and are placed at the pump’s wet well. Design of the Sure Seal Foot Valves evolved through the need for a reliable valve that could provide positive seating action at both low and high quality pressures without slamming. If the check valve leaks, after the pump runs, the water goes back into the well. When the pump starts, it'll lose its prime. Both use a swinging disc to block and allow flow in one direction. If the foot valve leaks any at all, and the check valve seals, the water in the pipe will be in a vacuum. Foot valves are used to maintain hydraulic pressure and they come in three types. So the pressure drops, then the pump comes back on. FT Series Foot Valves The Foot Valve is available in … A check valve or foot valve helps avoid losing prime - which in turn keeps a pump from running dry. A foot valve is what is known as a check valve. A foot valve keeps the inlet pipe full up to the pump whereas as a check valve doesn't guarantee it will - the inlet pipe from the CV to the tank could drain back, although in theory it shouldn't as there will be a vacuum to hold the pipe full. But you've no pump. If the depth of the well permits, you may need to install a well pump. The Val-Matic® Sure Seal Foot Valve satisfies these requirements plus offers low headloss through the full-ported area and heavy-duty stainless steel basket screening. Somehow. Foot valves incorporate mesh to prevent debris from entering the pump while it is in operation. When it comes to check valves, swing checks and wafer checks are actually similar in many ways. A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.. The BT Series (True Union) and BC Series (Single Union) Ball Check Valves is the most popular type of non-return valves for pipe sizes up to 4". PeterPaul (PPE) offers many of thousands of possibilities from solenoid valves that operate with power as low as 1/2 watt to pressure as high as 3000 psi. Check valves are one-way valves, that is, they can open in only one direction. 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