Water-Flow Prevention Device is designed to temporarily isolate the flow of water in pipes to allow you to work on the removal, refitting or soldering of valves or fittings.

They can hold up to 75 PSI of pressure allowing heavy duty work to be carried out. You can stem the flow from a tank down service whilst removing/replacing the gate valves. Or in central heating, you can temporarily isolate the feed and expansion down service pipe.

Jet Swet’s come in sizes from: 15-150mm. The 15mm, 22mm and 28mm’s are stock items, but larger sizes are available to order. ”


5 + 22mm Jet Swet Pack

Product code: NTJS1522

Replacement gasket code for 15mm: NTJS15RG

Replacement gasket code for 22mm: NTJS22RG


28mm Jet Swet

Product code: NTJS28



Larger Sized Jet Swets

Jet Swets range up to size 150mm. These larger tools are available to order.



Jet Swet in Use

For use in stopping flow from water tanks.

2 Year Guarantee – Conditions Apply