PINCH CLAMP/GUN

If you have got a pressure pot and cannot afford the luxury of a foot operated pinch valve then you need one of these.
 My original version was a winemakers pinch clamp on the tube and it has served me well for a couple of years but it has started to pop open at random intervals. So I rummaged around the shed for something suitable to adapt.
I found a woodworking clamp that I thought would work but it did not have quite enough strength with the original clamp ends to shut off air flow. A piece of 1/4 flat steel bar was cut for the bottom part of the clamp and glued in place with gorilla glue. Still not quite enough oomph to close off air flow and another piece of bar would be too much so  more rummaging found an old 1mil syringe I had  used for silvering/mirroring (More on that in a later post) cut it to size and glued it into place.
That did it a perfect seal. So I drilled a hole for the tube to go through and thought that would do, but it was quite hard work on the hand  to hold   it open so with what was left of the bar I fashioned a handle and attached it gun style. 

I know the picture isn't brilliant but it gives you the general idea. It is nice and comfortable to hold and should work well. 

When the tube wears through at the pinch point as it will eventually do you just cut off the worn part pull the tube through and put your nozzle back in.

The only tools used were a hacksaw and a battery drill and some brute force to bend the bar. 

Enjoy your build.

UPDATE!!!!  The urethane tubing has now been  changed for some soft rubber tube normally used for Bunsen burners. The pinch action is much sharper and flow is easier to control.