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Check Valves

Check Valve is an in-line, one-way valve which purpose is to prevent the backflow of water due to back pressure, gravity flow of thermal siphoning. Lead-free check valves are suited for both potable water plumbing and heating applications. Regular brass check valves can be used for non-potable water applications only. Available in swing and spring-loaded types.

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Product Description Part# / Brand Qty Unit Price
1/2" Threaded Swing Check Valve (Lead-Free)

521T03LF
Matco-Norca
x1
$5.85 / each
x12
$64.80 / box
($5.40 / each)
3/4" Threaded Swing Check Valve (Lead-Free)

521T04LF
Matco-Norca
x1
$7.60 / each
x10
$70.50 / box
($7.05 / each)
1" Threaded Swing Check Valve (Lead-Free)

521T05LF
Matco-Norca
x1
$10.25 / each
x5
$47.75 / box
($9.55 / each)
1-1/4" Threaded Swing Check Valve (Lead-Free)

521T06LF
Matco-Norca
x1
$16.35 / each
x5
$77.50 / box
($15.50 / each)
1/2" Sweat (CxC) Swing Check Valve (Lead-Free)

521C03LF
Matco-Norca
x1
$5.85 / each
x12
$64.80 / box
($5.40 / each)
3/4" Sweat (CxC) Swing Check Valve (Lead-Free)

521C04LF
Matco-Norca
 
x1
$7.60 / each
x10
$70.50 / box
($7.05 / each)
1" Sweat (CxC) Swing Check Valve (Lead-Free)

521C05LF
Matco-Norca
x1
$10.25 / each
x5
$47.75 / box
($9.55 / each)
1-1/4" Sweat (CxC) Swing Check Valve (Lead-Free)

521C06LF
Matco-Norca
x1
$16.35 / each
x5
$77.50 / box
($15.50 / each)
1/2" Threaded Spring Check Valve

BVCK012
Wright Valves
Not Lead Free
x1
$3.75 / each
x10
$35.00 / box
($3.50 / each)
1/2" Threaded Spring Check Valve (Lead-Free)

525T03LF
Matco-Norca
x1
$6.50 / each
x10
$61.50 / box
($6.15 / each)
3/4" Threaded Spring Check Valve

BVCK034
Wright Valves
Not Lead Free
x1
$5.75 / each
x10
$54.00 / box
($5.40 / each)
3/4" Threaded Spring Check Valve (Lead-Free)

Temporary Out of Stock

525T04LF
Matco-Norca
x1
$8.40 / each
x10
$81.00 / box
($8.10 / each)
1" Threaded Spring Check Valve

BVCK100
Wright Valves
Not Lead Free
x1
$6.75 / each
x10
$64.50 / box
($6.45 / each)
1" Threaded Spring Check Valve (Lead-Free)

Temporary Out of Stock

525T05LF
Matco-Norca
x1
$11.95 / each
x6
$67.80 / box
($11.30 / each)
1-1/4" Threaded Spring Check Valve

BVCK114
Wright Valves
Not Lead Free
x1
$11.25 / each
x8
$84.00 / box
($10.50 / each)
1-1/4" Threaded Spring Check Valve (Lead-Free)

525T06LF
Matco-Norca
x1
$19.25 / each
x4
$74.00 / box
($18.50 / each)
1-1/2" Threaded Spring Check Valve

BVCK112
Wright Valves
Not Lead Free
x1
$14.50 / each
2" Threaded Spring Check Valve

BVCK200
Wright Valves
Not Lead Free
x1
$22.25 / each
1/2" Sweat (CxC) Spring Check Valve (Lead-Free)

525C03LF
Matco-Norca
x1
$7.75 / each
x10
$73.00 / box
($7.30 / each)
3/4" Sweat (CxC) Spring Check Valve (Lead-Free)

525C04LF
Matco-Norca
x1
$11.15 / each
x10
$106.50 / box
($10.65 / each)
1" Sweat (CxC) Spring Check Valve (Lead-Free)

525C05LF
Matco-Norca
x1
$15.85 / each
x6
$91.20 / box
($15.20 / each)
1-1/4" Sweat (CxC) Spring Check Valve (Lead-Free)

525C06LF
Matco-Norca
x1
$23.80 / each
x4
$91.00 / box
($22.75 / each)
1-1/4" Threaded Foot Valve (Lead-Free)

527T06LF
Matco-Norca
x1
$16.50 / each
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About Check Valves

In plumbing applications, check valve is often used to prevent the cross-contamination of water due to back pressure or back-siphonage, often caused by drop in pressure on the supply side or by draining the system.
In heating applications, check valve acts as a one-way valve to prevent mixing of the supply and return water, especially in systems with radiant floors and baseboard/panel radiators.

Difference between Swing and Spring Loaded Check Valves

Swing type check valve (also commonly called "swing check") has an internal brass flapper suspended on a shaft. When looking at the picture of the swing check, the shaft end is visible (brass hexagonal bolt head). In a horizontal position (as shown on the product picture), the flapper is in vertical position and closes the opening. When water starts to flow from the inlet, it pushes against the flapper and, with no resistance, opens it. It water is pushed backwards, the flapper return to the original positions, sealing the opening. Because of the nature of the design of the swing check valves, they should only be used on horizontal pipe runs, as level as possible.

Spring loaded check valves have a brass flapper with rubber gasket, which is secured on the shaft/stem located at the center of the valve and running parallel with the water flow. A steel spring inside the valve pushes the flapper against the opening with small force, ensuring that no water is flowing due to gravity. When water begins to flow, it pushes against the flapper and opens it with minimal resistance. In case of a backflow, the spring quickly pushes the flapper back in place, which immediately stops the flow. Unlike swing type, spring check valves can be installed in any position - horizontal, vertical or anywhere in between.

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