Inflation valves and PRVs are here
Your inflatable packboat needs a pump to get going and to top-up once on the water. These functions may be best performed by two different pumps. It seems the era of the bellows footpump (left) is over and even low-pressure IKs now come with barrel pumps.
A plastic-bodied barrel or stirrup pump is light but bulky so not something you’d want to tour with. They’re usually used for pumping up high volume/low pressure things like rafts, lots of IKs or kite wings. Some pump air on both up and down strokes to fill your boat more quickly but may automatically or manually switch to downstroke-only to attain higher pressures. They work best on flat, firm ground where you can stand on the stirrup plates and get stuck in. The Bravo 4 RED pump above is still only about £20 and will pump up an IK in 5 minutes.
I got a Bravo 6 with my Seawave once but found it hard work – who knows why. The cheaper Bravo 4 does claim to be an ‘R.E.D’ (‘reduced effort device’) and I can confirm this isn’t some gimmicky acronym. Like a Bravo foot pump, the other port on the Bravo’s handle can be used to deflate or suck air from an IK so it rolls up good and flat; you can see creases forming in the hull as you suck it down.
I left my Bravo 4 RED at home one time so bought a Sevylor RB2500G barrel pump (below left) for a tenner off ebay. Same size as the Bravo barrels, it well for the awkward topping-up of my Semperit’s lilo plugs. It came with push-fit, lilo-plug and bayonet adaptors and sucks as well as pumps. But pumping up my Seawave from flat was exhausting towards the end: I actually got out of breath and had to rest. Morale of this fascinating story: get a Bravo 4 RED and the right adaptor for your boat.
Not all barrels have a built-in pressure gauge which is obviously dead handy in getting the right pressure without needing to faff about using a separate manometer (see below). It’s worth an extra tenner to get a built-in gauge, especially with DS boats, or you can fit your own manometre: see bottom of the page.
The K-Pump Mini (above right) is a handy top-up pump or compact 600-g travel pump. It took 15 minutes to fully inflate up my Seawave; the push-fit nozzle works on any IK with one-way spring valves. You have to press the body of the pump against the valve. Using it a lot one time, I got the feeling it might break something or wear out the seal (which needs regreasing once in a while). I also now use the K-Pump to top up my Nomad S1 packraft which is too big and long to inflate firmly with just its airbag. Fuller review of the K-Pump Mini here. Hard to find in the UK, the long, and slim US-made K-Pump 200 (right) may also be suited to DS applications.
Left, the Bestway Air Hammer is an upside-down barrel pump which comes in three sizes and costs from just £6 on eBay. If you don’t want to paddle with your full-size barrel pump, the smallest Air Hammer could work as a compact top-up pump, like the K-Pump below but a tenth of the price.
High pressure pumps
More and more IKs now feature super-rigid, high-pressure drop-stitch hulls – either just floors or the entire hull which runs 2–5 times higher pressures than regular IKs. Your old Bravo footpump will blow its brains out trying to reach the typical 7-10psi.
Barrel pumps with slim and long bodies (as opposed to some of the shorter, stockier examples above) will put out less volume (D/S IKs have less volume anyway) but can attain higher pressures. You don’t need a super high-pressure iSup board pump. Some of these pumps may be double action, but at a certain psi will become single action to help gain higher pressures. I beleive the Bravo Alu 4 R.E.D (0.8 bar) works like that.
Whatever you get for your D/S IK, make sure it is rated to comfortably exceed your D/S boat’s pressure rating by say 50%.
Suited to low-pressure (non-dropstitch) IKs the once-popular Bravo bellows foot pump looks a bit crap, but lasted well, was fairly travel-compact and was easy to use without doing your back in. Occasionally the yellow tube split near either end if packed too tightly, so needed taping up (left) or cutting down and got shorter and shorter over the years. as mention, the bellows era seems to have passed.
After many years a crease in the back of the bellows wore through, though that’s also easily fixed with duct tape. It’s a shame the Bravo pump is a tight squeeze into the Gumotex drybag’s outer pocket. If you use a Bravo footpump very frequently it just plain wears out, so if you’re using the car to get to the water get a barrel pump.
Pressure gauge (manometer)
Until I got a Grabner which has no PRVs but ran a relatively high, 0.3 bar (4.3 psi), I never bothered with a pressure gauge (manometer, left) and just pumped up by feel.
Since then I got a Gumotex Seawave and fitted PRVs to all chambers. That means I didn’t need a pressure gauge to get the right pressure, I simply kept pumping until each PRV hissed: the boat was then at operating pressure.
With high-pressure D/S IKs you probably do want a pressure gauge as the boat will perform best at the right pressure which may be higher than you’re used to.
Add a manometer dial to a plain barrel pump
I got myself a new Brave 4 Alu R.E.D barrel pump (left) rated to 0.8 bar (typical D/S pressure). It was under £20 without a gauge. The next similarly rated barrel with a gauge worked out at nearly fifty quid. That’s inflation for you.
Then I decided a gauge probably was a good idea in case my next IK doesn’t have full PRVs (quite likely; most don’t). I couldn’t find a way to fit my handheld manometer (as pictured far above) neatly, but on ebay saw manometer dials at various displays and with rear (behind) rather than bottom inlets for a fiver (right)
I chose one which displayed up to 1 bar / 14.5psi. Whatever boat I get next, D/S or otherwise, it won’t be higher than that, and anyway the Alu 4 is only rated to 11.6psi (0.8 bar).
The easiest place to drill the hole is into the hard plastic end of the hose by the handle (below). The brass thread will screw into the plastic hole easily enough, but a dab of glue does no harm. Now, finally I can measure as I pump.