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Do you trust your kite pump guage?

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gator1
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Do you trust your kite pump guage?

Postby gator1 » Mon Oct 26, 2020 2:34 am

After a year of use. I'm beginning to think my pump gauge has good days and bad days.

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Re: Do you trust your kite pump guage?

Postby Matteo V » Mon Oct 26, 2020 4:00 am

gator1 wrote:
Mon Oct 26, 2020 2:34 am
After a year of use. I'm beginning to think my pump gauge has good days and bad days.
Took me 2 years, and buying a brand of kites that blew up on the beach, for me to really start to question things. But I'm with you on the good days and bad days thing. Some days I swear it reads fine, and other days I just look away from the gauge and feel the kite instead.

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Re: Do you trust your kite pump guage?

Postby clint2070 » Mon Oct 26, 2020 4:15 am

I don't trust mine at all

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Re: Do you trust your kite pump guage?

Postby longwhitecloud » Mon Oct 26, 2020 5:39 am

well they seem to last about a few weeks fully functioning - not exactly the pinnacle of engineering gauges

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Re: Do you trust your kite pump guage?

Postby Peter_Frank » Mon Oct 26, 2020 7:30 am

I've never had any issues with the gauges.

Of course you can not use nor trust the absolute value one bit, but when you know which "number" your specific kite should be pumped to, to feel and be right, it works great.

Dont experience on/off days even with these low cost gauges, amazingly.

Only that the absolute value can be useless, but it does not matter (unless you are new into kitesurfing....)

8) Peter

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Re: Do you trust your kite pump guage?

Postby andylc » Mon Oct 26, 2020 9:37 am

Pretty confident the gauge on my F-one pump is working he same now as it did when new. I use it as a guide rather than assuming it’s a scientific instrument.

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Re: Do you trust your kite pump guage?

Postby Onda » Mon Oct 26, 2020 10:26 am

The only thing you can trust for sure is your body weight.
Use the respective formula which considers your weight, pump piston diameter and gravitation and you can easily calculate that a 75 kg body cannot reach more than 8-10 psi (when you´re laying your full weight on the piston). This is only valid for a "normal" kite pump with 10 or 12 cm piston diameter, NOT for a SUP pump.
Hence, I pump my kites as hard as I can, literally, and I know the pressure.

The super-cheap gauges not even offer a rough guess.

Pressure [Pa] = Force / area = body_mass [kg] x 9,81 / (PI x 0.05²)
Pressure [psi] = Pressure [Pa] / 6,895

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Re: Do you trust your kite pump guage?

Postby Baptiste_FR » Mon Oct 26, 2020 10:38 am

No, pump gauge cannot be trusted. It's an indicator, it's useful, but using the gauge to stop pumping when the gauge points at 7 PSI is not precise at all.
You can buy a pump with gauge for less than 30 €/$ so the gauge is not precise and cannot be high quality.
7 PSI is less than 0,5 Bar and you can be sure to have great difference if comparing several pumps (for such a small pressure to measure).
It doesn't not mean it's complete rubbish but the good old method of stopping pumping when it's hard to pump and then pressuring the kite with finger is as efficient.

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Re: Do you trust your kite pump guage?

Postby Toby » Mon Oct 26, 2020 10:44 am

I never look at it.
Always do the pressure test with my hand.

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Re: Do you trust your kite pump guage?

Postby RedSky » Mon Oct 26, 2020 10:49 am

Just drum the tube


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