Asked by: Kamal Sakiyaev
real estate vacation properties

Does a submersible pump have a built in check valve?

Last Updated: 5th April, 2020

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Check valves permit water flow only in one direction, and are required on all submersible pump installations. Some submersible pumps have built-in check valves, and are suitable for operation without an external check valve, provided the pump setting is not too deep.

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In this regard, where do you put the check valve on a submersible pump?

In submersible pump applications, the first check valve should be installed directly on the discharge head of the pump or maximum one pipe length (20 feet) above pump. Water pumped and flowing through a piping system has a certain amount of energy (weight x velocity).

Likewise, do I need a check valve on my pressure tank? You need a check valve at the pump discharge and another above ground before the pressure tank. The one at the pump keeps the pipe full so you don't have a lag when the pump starts (no water hammer). You have water immediately.

Keeping this in view, where is a check valve located?

Check valves are found everywhere, including the home. If you have a sump pump in the basement, a check valve is probably in the discharge line of the pump. Outside the home, they are found in virtually every industry where a pump is located.

How do I know if I have a bad check valve?

Failing valves will emit warning signs at the first hint of trouble. For example, failing check valves will start to vibrate and even lose some internal parts when problems begin to arise. Other symptoms of check valve failure include reverse flow and excessive component wear and damage.

Related Question Answers

Bacilio Lumley

Professional

How much does a check valve cost?

Most homeowners pay between $135 and $1,000 depending on the size and type of the system. The device itself ranges from $35 to $600, while professional labor costs between $100 and $400. Expect to pay between $70 and $250 for a backwater or check valve, including install.

Britney El Hajjioui

Explainer

Do well pumps have a check valve?

A check valve is a valve that is used to prevent backflow in a piping system. Many well pumps have built-in check valves. Even if a pump does have a built-in check valve, we recommend that a check valve be installed in the discharge line within 25 feet of the pump and below the draw down level of the water supply.

Homar Glashauser

Explainer

Is a check valve necessary?

Check valves are designed to permit water to flow in one direction and are a requirement on all submersible pump installations. Their job is to prevent water in the column above the pump and in the pressure tank from draining back into the well when the pump shuts off.

Marylene Nienstedt

Explainer

Can check valve be installed vertically?

Check valve can be installed in horizontal or vertical piping runs, with the flow running upward. Mounting for vertical installations is critical.

Yonny Duncklenberg

Pundit

Where do you put a check valve on a pressure tank?

1. Check Valve Located at the top of the pump to prevent back flow into pump and hold the head of water in the system. 2. Torque Arrestor Installed directly above Submersible Pump to protect pump and well components from starting torque damage.

Samaria Vath

Pundit

Can a check valve be submerged?

If the valve is installed in a submerged condition, this means that there will always be back pressure on the valve.

Vincenza Lokhanov

Pundit

What is the symbol for a check valve?

An arrow or the symbol for any type of check valve (a fluidic/pneumatic logic symbol) on the outside of the body indicates flow direction.

Carly Estop

Pundit

How do you check a check valve?

Shut off the water supply to the check valve. Follow the water line backwards (the flow of water is indicated by an arrow on the check valve) and switch off the next valve. Wait 15 to 20 minutes for the water pressure to subside. Check the valve for debris by tapping its side with the handle of a screwdriver.

Lamin Zell

Teacher

Can you install a check valve horizontally?

Valve may be installed horizontally or vertically. However, when installed in systems handling solids, valve must be installed horizontally or at a maximum of a 45° angle. Valves have flow direction arrows, horizontal and vertical position markings molded on them.

Logan Heimsohn

Teacher

What is the difference between a check valve and a non return valve?

A non-return valve allows the flow of fluid in only one direction. A check valve also allows flow in one direction and automatically prevents backflow when fluid in the line reverses direction. Typically the check valves are designed for a specific cracking pressure.

Vanya Daalmann

Reviewer

What is cracking pressure on a check valve?

What is check valve cracking pressure? Cracking pressure is the minimum upstream pressure required to open a check valve enough to allow detectable flow. Detectable flow is when the check valve allows a small but steady flow of liquid or gas to pass through the valve body and out through its outlet port.

Ahinoam Dierick

Reviewer

What happens when a check valve fails?

A component failure can result in the valve not performing its function, which in the case of a check valve is to prevent reverse flow. In extreme cases, failure could result in the component or components escaping into the line, causing failure or nonperformance of other valves or equipment in the line.

Raico Nevot

Reviewer

How often should a check valve be replaced?

The single best way to extend the life of your valves is through preventative maintenance. In general, we recommend the following schedule: Testing every 12 months. Repair every three to five years.

Teo Homaiko

Supporter

Why is a check valve installed on the discharge side of a pump?

A check valve may be installed on the suction side of the pump to maintain the pump's prime in the event of a pump shutdown. A check valve will be used commonly on the discharge of the pump to prevent backflow from the downstream system, when the pump shuts off.

Marciala Kabjihov

Supporter

Does a check valve go before or after a pump?

To prevent water from backing up thru the system after the pump is shut off, a check valve must be installed just before the chlorination device - on the side going to your filter of heater.

Manola Lovillo

Supporter

Does a shallow well need a check valve?

Because shallow-well jet pumps use water to draw water, they generally need to be primed–filled with water–before they'll work. To keep water in the pump and plumbing system from flowing back down into the well, a 1-way check valve is installed in the feed line to the pump.

Kapka Blanaru

Beginner

Can I use a check valve instead of a foot valve?

The only differences are that the foot valve has a screen on it and a check valve does not, and a check valve has threads on both ends so you can put it in line. A foot valve only has threads on one end because it's meant to be at the end of a pipe.

Izaskun Rohrmann

Beginner

Is a foot valve a check valve?

A foot valve is a type of check valve that is typically installed at a pump or at the bottom of a pipe line (hence the name). Foot valves can be found in ponds, pools and almost anywhere there is a pump. These special valves allow the pump to stay primed, letting liquid to flow in, but keeping it from flowing back out.

Suhua Alaniz

Beginner

Can a check valve fail closed?

One, check valves are prone to jamming in the open position, thereby becoming an uncheck valve of sorts. Two, they are prone to jamming in the closed position, preventing water flow in any direction. If the check valve is stuck open, the pump runs and pumps just fine; however, it won't prevent backflow or flooding.