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Non Return Valves

All Prices Include FREE Delivery and VAT

For Sprung Valves Click Here:
For Un-Sprung Valves Click Here:

These translucent, plastic, barbed one way valves are either sprung loaded or un-sprund (floating) & made from tough polypropylene.  They are suitable for a wide range of liquid and gas applications, where back-flow needs to be eliminated. 

Example uses include Windscreen Washer Fittings, Garden Water Pumps, Engineering, Air & many other DIY uses.  (It is the customers responsibility to ensure suitability and safety of use).

* Please note that designs may vary from the image in this listing

* Good UV Resistance

* The images are an accurate representation and shows all sizes listed. (All images within this multi-listing - © PVC Tube Online Ltd).  Please see the table below for full fitting dimensions and other data:

* Not certified for Food Contact Use

Sprung Valves Technical Info:

To Fit Tube 
(I.D. mm)

Minimum Barb Diameter (mm)    

Maximum Barb Diameter (mm)    

Bore Diameter(mm)

Fitting Length(mm)

Colour 

Material

Opening Pressure

Maximum Pressure

Valve Activation

3

3.0

4.4

2.1

32.5

Translucent

Polypropylene  

< 1.0 KP

43 PSI/0.3 MPA

Valve Sprung Closed Zero Flow / Pressure

4

4.2

5.8

3.0

36.3

Translucent

Polypropylene  

< 1.0 KP

43 PSI/0.3 MPA

Valve Sprung Closed Zero Flow / Pressure

5

4.9

6.1

3.1

41.6

Translucent

Polypropylene  

< 1.0 KP

43 PSI/0.3 MPA

Valve Sprung Closed Zero Flow / Pressure

6

5.2

6.6

3.9

44.6

Translucent

Polypropylene  

< 1.0 KP

43 PSI/0.3 MPA

Valve Sprung Closed Zero Flow / Pressure

8

8.0

8.5

6.0

38.5

Translucent

Polypropylene  

< 1.0 KP

43 PSI/0.3 MPA

Valve Sprung Closed Zero Flow / Pressure

9

9.8

10.4

8.0

45.3

Translucent

Polypropylene  

< 1.0 KP

43 PSI/0.3 MPA

Valve Sprung Closed Zero Flow / Pressure

10

9.8

10.4

8.0

45.3

Translucent

Polypropylene  

< 1.0 KP

43 PSI/0.3 MPA

Valve Sprung Closed Zero Flow / Pressure

12

11.3

12.5

9.0

38.7

Translucent

Polypropylene  

< 1.0 KP

43 PSI/0.3 MPA

Valve Sprung Closed Zero Flow / Pressure

Un-Sprung Valves Technical Info:

To Fit Tube 
(I.D. mm)

Minimum Barb Diameter (mm)   

Maximum Barb Diameter (mm)   

Bore Diameter(mm)

Fitting Length (mm)

Colour 

Material

Opening Pressure

Maximum Pressure

Valve Activation

3

3.0

4.4

2.1

32.5

Translucent

Polypropylene  

< 1.0 KP

43 PSI/0.3 MPA

Floating (Un-Sprung) / Requires Small Flow/Pressure to activate

6

Tapered 5.6

Tapered 6.7

3.8

43.1

Translucent

Polypropylene  

< 1.0 KP

43 PSI/0.3 MPA

Floating (Un-Sprung) / Requires Small Flow/Pressure to activate

8

7.7

8.2

5.8

38.2

Translucent

Polypropylene  

< 1.0 KP

43 PSI/0.3 MPA

Floating (Un-Sprung) / Requires Small Flow/Pressure to activate

9

9.8

10.4

8.0

45.3

Translucent

Polypropylene  

< 1.0 KP

43 PSI/0.3 MPA

Floating (Un-Sprung) / Requires Small Flow/Pressure to activate

10

9.8

10.4

8.0

45.3

Translucent

Polypropylene  

< 1.0 KP

43 PSI/0.3 MPA

Floating (Un-Sprung) / Requires Small Flow/Pressure to activate

12

11.3

12.5

9.0

38.7

Translucent

Polypropylene  

< 1.0 KP

43 PSI/0.3 MPA

Floating (Un-Sprung) / Requires Small Flow/Pressure to activate