HELP silly question on inflatable tender valves

Bought a inflatable boat to use as a tender...Attach pump no problem , couple of bayonet forks on the end of the pipe. Pumps up fine but when I take the pipe off the air rushes out ...??? WTF.. all three the same .

 

Found answer on You tube ...Rotate small knob in centre of valve AC to shut it ...dumbo

 

You will note that he has the valve pushed in at the start of the inflation and quickly pushes and turns the valve to get it to close. Depending on the type of pump that you have, it is faster
to inflate your boat with the valve in the pushed in/open position than pumping the boat up with the valve in the closed position. As in the close position the valve has a reduced flow rate.

Then finish the blow up with the valve in the closed position to get to whatever pressure that the boat needs.

If you have a small motor on the boat with enough horsepower that it should plane, but does not, probably the boat is not pumped up to the proper pressure. Pressure gauges are cheap,
best to follow the manufacturers recommendations and if you pumped it up cold, relieve some pressure at extremely hot temperatures.

Depending on the material, and if you have room, when storing it, for extended periods of time, leave the boat partially pumped up. This will eliminate tight bends in the fabric, like a crease, that can be focal point
for leaks to start.

 

Thanks for that ..I am using an ex land rover suspension pump to inflate it 14 min for all 3 chambers and an old Dyson hand vacuum to suck the air out when deflating...thanks again

 

pb,

A pressure gauge is invaluable.
Getting the pressure bang-on will do you very well indeed.
Not enough sucks and too much is even worse.
It's ridiculously low for such hard tubes, like 3 or 4 psi.
Floors run much higher, Google your model.

Building the gauge into the pump is brilliant.

What inflatable did you buy?

 

Have the pressure gauge built in so all is good 0.25 bar specified

 

Well, I hope it's a Zodiac Mark 5.
Best little boat I've ever driven.
It had twin 90's on the back.
Have fun.

 

Its a 10ft tender