John Guest polypropylene shut-off valve
In-line manual valve with push-fit connections to control flow in a tube line.
Available sizes
1/4", 5/16", 3/8" and 12 mm, depending on variant.
Applications
Suitable for isolating sections in compatible water, dispensing, camper or other circuits where manual shut‑off is required.
Selection and installation
Measure the actual outside diameter of the tube, select the exact variant, make straight cuts, and insert fully. Place the valve in an accessible position.
Maintenance
Check the operation periodically and make sure there is no stress on the connections.
Frequently asked questions
Are 12 mm and 1/2" the same?
No.
Can I shut off just one section?
Yes, if the valve is installed in that line.
Which size should I choose?
The one that matches the tube’s outside diameter.
Does the material change by variant?
This data sheet refers to the specified polypropylene family.