Cheap Hookah! We build a Surface Air Breathing System.
We give you all the details, cost and show you how it's done.
We go through the safety aspects and the risks in detail.
#Bavariayachts #medsailing #sailinginthemed #svimpavidus #boatelectrical #sailingvideos #boatsurvey #boatworks #boatmaintenance #liveaboard #boattools #sailingyoutube #sailingvideos #Hookah #divegear
Closed Captions (CC):
in this video
i got a cheap hooker oh not that type of
hooker
i mean a surface air breathing system
[Music]
diver safety please do not skip or zoom
forward this short presentation
on diver safety there's things you need
to know
and it's our responsibility to tell you
the air we breathe is only about 20
oxygen so the illustration that you see
above from wikipedia
is wrong around 79 is actually nitrogen
and the other 1
is other gases these percentages are
important
we'll come back to them in a minute or
two the air pressure around us at sea
level is one atmosphere or
14.7 pounds per square inch and we refer
to this as one bar
again this figure is important we do not
notice the pressure
because the am it's ambient and all
around us
and inside our body spaces too as well
as in our blood
if we climb a mountain or go up in an
aircraft we notice the change in
pressure
as we go up the pressure goes down or
gets less
we often say my ears just popped or the
air up here on this mountain is thin
and that's because the pressure is lower
how does that affect me
if i'm just building a hooker well
actually it could have a big effect on
you
please watch on so the air at sea level
is one atmosphere
14.7 pounds or one bar
as we dive or swim in the ocean the
deeper we go
the greater the pressure gets because of
the weight of water above us
at 10 meters depth the weight of water
above us
causes the pressure to increase by one
bar to a total of two bar
at 20 meters depth the pressure
increases by 2 bar to a total of 3
bar and at 30 meters depth the pressure
increases by 3 bar
to a total of 4 bar and so on
so i've done a little illustration here
a graph
and by the way if you want any of these
slides in touch and we'll
get them to you or put them on the
website or something every 10 meters we
descend the total pressure acting on us
increases by one bar at 50 meters depth
there is six bar of total pressure or
88.2 psi each bar
or atmosphere is made up from the same
percentage of gases on the surface
we said the oxygen was 20 or 0.2 of a
bar
and nitrogen was 79 or 0.79 of a bar
if at 50 meters we are breeding air at
six bar that's the equivalent
of 6 times 0.2 bar
or 1.2 bar of total oxygen
the same applies with nitrogen at 4.74
bar of nitrogen
breathing compressed air can have funny
consequences
breathing oxygen at partial pressure as
low as 1.2 bar
or above the oxygen becomes toxic to
humans
breathing nitrogen at these pressures
can cause
nitrogen narcosis a drunken euphoric
state
where you can lose consciousness or
start behaving well
erratically so why do we need to be
aware of this
with a hooker or surface air breathing
system
or using a surface air breathing system
means that you are breathing pressure
relevant to your depth ie at 10 meters
you'd be breathing
two bar as you can see from the graph
above
this line is linear so if you're only
diving at
say three meters the bottom of your keel
of your boat you're actually breathing
air at 1.3 bar
not in itself dangerous unless you hold
your breath and come to the surface of
the lung full of air
however any deeper and prolonged
immersion
could be a problem i'll explain more
wait you at the back
pay attention this is important
breathing air on land we get used to the
pressure
and the levels of gases these are
absorbed into our
blood body tissues and bone and are not
harmful
when we breathe air at pressures the
same thing occurs
these gases oxygen and nitrogen are
absorbed into our blood
body tissues and bone but the pressure
is higher and therefore
compared to the surface we're absorbing
these gases
a much higher rate at 10 meters depth we
would be absorbing twice the amount as
the pressure is twice the pressure on
the surface
blood soft tissues absorb these gases
quickly and hard tissues like
cartilage and bone absorb them slowly
the longer you dive the more it is
absorbed
the problem occurs when you come to the
surface
the air in your lungs is compressed
because you've breathed it
at pressure as you come up from depth
the pressure reduces the air volume gets
bigger so you must not hold your breath
even on a shallow dive
the air in your lungs will expand as you
come up
it only takes a small expansion of air
in your lungs
to cause a lot of damage and we call
this a barotrauma
while the blood soft tissues will also
off gas the extra volume of gases that
you have absorbed
cartilage and bun take longer the longer
and deeper you are
the more gas has to come out if these
gases form bubbles in any part of your
body they are serious
divers call these bubbles the bends a
bend in your lung
heart or brain will probably kill you or
leave you seriously injured or paralyzed
forever
shallow depth boat cleaning is
reasonably safe
but any deeper without having specific
training
knowledge and experience and knowing the
risks is just plain stupid
so cleaning your boat okay but any
deeper
just not on if you want to go deeper go
to a reputable subaqua club
or a facility where you can learn how to
dive
properly
while i was editing the hooker video i
was thinking about
how gases are absorbed
into the body and specifically
it's blood which which takes up gases
and then soft tissue and then button in
that order
and this is very similar to the way that
water is carbonized or the soda stream
works
let's talk about gases in suspension
this is a bottle of carbonated water you
know
like you'd get from a soda stream
it's very much like your blood when
you're diving
because you're breathing compressed air
you're having a lot more of those gases
absorbed into your blood
you can't see them when you're diving
you can't see them here in this bottle
but if i was to come up very quickly
from depth
or release the pressure
way you can see what happens
bubbles start to form in the liquid
and that's exactly what happens when
you've come up from depth
when you've been diving so with your
hooker you're not likely to be diving
down to
20 30 meters and that's the point that
i'm trying to make
these hookers are designed for cleaning
your boat cleaning your swimming pool
very very shallow depths but the longer
you dive
the more gases are going to be absorbed
into your blood or into your soft
tissues or even your bone
and it's when that pressure is released
when you come up
that the bubbles will form you don't
want bubbles in your blood do you
let's get on
so this is our uh hooker system all the
bits and pieces that we've bought
and what i'll do is i'll just run you um
through these the first thing is this
is an oilless compressor so
it uh compresses air puts it into this
cylinder here um which
is five liters that's five liters
at 10 bar and 10 atmospheres
it has a secondary valve here a
gauge here and the primary gauge tells
you how much
pressure is in the cylinder
and the secondary one tells you how much
pressure you have in your line and you
can adjust that
here and we're going to be operating at
about two bars so
quite low pressure um
that's a valve gun um so it's 1.5
horsepower which is about
1150 watts something like that and it
will run either from our
generator or it will run from
our inverter so we can use solar power
to charge our batteries and run our
inverter so basically we can use this
at anchor either using the generator
or using solar power via our inverter
the next thing is this hose now this was
quite hard to get hold of
this is a breathing airline
for air or water and it works
up to 21 bar
and it's rated at 21 bar
at 20 degrees celsius so it's a let's
get that in there so it's a reinforced
hose
with an inner and outer and a woven
braid around the outside now this this
hose is food grade
and it's breathing grade the reason that
you have to use that we don't have to
use it
is that ordinary pvc hoses give off
hydrocarbons
and they give off a nasty smell uh as
they degrade
and the breathing hose doesn't so you
could use garden hose
you can use you know fuel hose but
you'll be breathing in all those
hydrocarbons over the years that you use
it so
not a good idea next
is this is the hose towel
which we're going to put into this hose
and this is the connector which goes
into there quick release connector
standard air
airline fitting and we've got some ptfe
tape just to make those off
obviously we've got some hose clips
and we have a regulator
and the regulator has an unusual thread
i can't remember what it's called now i
think it's mpt
um but that seals with an o-ring
on the end and then we have
a hose tail for that which has got the
same
thread in there so we're going to put
all these together
oh the one thing that didn't mention was
was this so this is a 5 micron
fuel filter um
what we're going to do is we're actually
going to put that
in the line and the idea of that is that
should something particulates come
through the compressor it's going to get
stopped by
this filter and i won't be breathing it
in
now it's not absolutely necessary but
it's just an added safety feature
you can you know obviously there's air
coming in there's a little
gauze filter inside here which you can
clean out but what i don't want to do is
to be
breeding bits of
whatever whatever the compressor is uh
putting in
um you can put a moisture trap in here
as well
if you want to um and again they're
cheap as chips but it's not necessary
i'm just putting a that filter in there
for a
little extra safety so let's get this
put together
and just boil a kettle of water
put that in there for a few minutes
and there we go slide that over there
give it a chance to cool
and then we're going to put a jubilee
clip
close clip on there
uh ptfe tape
and we're just going to wrap that
carefully around there
there we go
and then that
screw on there let's get a couple of
spanners
and do that
so this doesn't need to be super tight
just pinch it up
and there we go
and the next thing we want to do is to
put that one on there
and what i'm going to do is just slice
this off to the bigger diameter
grab our kettle of water again just to
warm that tube
of course this time i'm going to need to
put the
pipe clip or jubilee clip
over there first and then slide that on
see how easy that is when you just warm
them with some
some hot water
okay and then we're going to do the same
on the end of this hose here put that
one on there
obviously we'll put a jubilee clip on
hose clip on there
that one will go on there when i've
heated it up
and then we'll do the same on the other
end of that hose there
i'll just carry on with that off camera
and show you when we're done
i'm sure you don't want to watch me
doing hose clips up
okay we're on the home straight now all
i've got to do
is connect the demand valve to the uh
to the hose i didn't like the end of
that hose it was a little bit damaged so
i've just cut
20 millimeters three quarters of an inch
off
that one's all on there now one thing i
didn't point out earlier
if you want your demand valve to have a
swivel in it
so this hose can go round and you can
move some people actually put a swivel
in here
i don't think it's necessary um
we're going to have plenty of of line so
we don't need the swivel
and all i've got to do now is push this
one down
and let that o-ring seat into the bottom
of that fit in there
okay
and this just gets nipped up no more
than that
because it's an o-ring seal
and there we are all done
okay let's uh
let's plug this in and charge up our
cylinder
and one of the things this has got on it
actually can be quite handy
it's got a tyre inflator not that our
boat's got wheels
but we've got uh two fold up bicycles
and also we've got a little fitting here
that we can blow up
fenders and lilo's and
inflatable toys etc
[Music]
okay well you can see that what we've
done i've
just bring the camera over i'll set that
to about 1.5 bar
because that's all we're going to need i
can hear a little hissing
that's just coming from that one there
[Music]
now demand valve is exactly what it says
invented by
jacques cousteau what it does is there's
a diaphragm in the front there
and it allows you to breathe compressed
air
at the ambient pressure so that's the
pressure of the water around you
when it's fitted to a first stage
[Music]
the demand valve can actually produce
air at about 130 bar
um let's show you what the first stage
is we've got one here
okay so this is uh my diverge
this is the octopus
and the cylinder or bottle clips onto
here
and the bottle is charged at about
232 bar
um there's a pressure gauge here a depth
gauge
and you can put a compass in there so
what this does is it takes that high
pressure air at 232 bar
and it drops it down to your
regulator or demand valve i've actually
got two
on this rig and allows the demand valve
to
supply you with air at the ambient
pressure so if you're at
10 meters it's going to be providing you
with air at 2 bar
and if you're at 20 meters it's going to
be providing you
with air at three bar so yeah
no leaks all works as soon as the water
warms up i'll be in cleaning propellers
scraping scraping the bottom all right
yeah i'm pleased with that let's have a
look at the numbers what did it cost
so our oilless compressor we bought from
amazon it
and that was 99 euros remember it must
be an oilless compressor
our demand valve again was 22 euros from
amazon and it came with the mpt adapter
to hose tail
already fitted our breathing air hose
was quite expensive we didn't pay as
much as this
but it was 25 euros and we had to fish
around to find it
in the end ordering it from the uk so
this is the type of
fuel filter that we used and there were
five microns
we had some on the boat so we just used
those i think we paid about
four euros for them and then there's the
hose clips and fittings which are eight
euros so a total of 158 euros
that's the cheapest hooker you're gonna
get
patrons support the making of these
videos they don't support our lifestyle
the money that we get from patreons and
from youtube
goes towards better equipment like
cameras
gimbals headsets and data that we have
to purchase
for uploading these videos to youtube
if you're not a patron why don't you pop
over to our patreon page
the links in the description or you can
use this one here
we'd love to have you on board and
patreons get lots of other things
like real real-time updates tracking
facilities
they can tell exactly where we are at
any given time
patrons can send us messages and take
part in our patreon forum
we can answer technical questions get
suggestions for them from videos and
much more
so if you're not a patreon come on join
the crew
[Music]
well thanks for watching i hope that
video is informative and
that you save yourselves a few bucks
when you
when you build a hooker surface air
breathing system
um a couple of things cindy and i are
both
dive instructors or were both dive
instructors
and cindy's got a archaeological
certificate as well so
so i can dig up old relics like me
um what else were we gonna say um safety
wise if you are diving under your boat
we
use and advise you to wear a hard hat or
something with a chin strap to stop it
riding up
and also and always puts a snood on
which is like balaclava
to stop squiggly things going in your
ears and yeah obviously your nose is
covered with a mask anyway
and also wear gloves because those
barnacles are razor sharp
they are razor sharp um and of course if
you've got a rope cutter on your prop
you're always going to dig your fingers
with it so you know
just just a few bits of of general
safety
um the other thing that uh we've seen
people use is use a
uh plastic cycle helmet you know
um under the boat the reason if the boat
comes down on you or something
yeah unfortunately we know of an
incident um
18 months ago two years ago someone was
telling us that uh
somebody was actually knocked out while
they were under their boat
um by the boat coming up and then coming
back down again on their head knock them
out
and uh unfortunately they drown um
and we were only told about that a
couple of days ago so
you know those kind of general sensible
safety things
you know you you ought to be doing so
once again subscribers thank you for
watching
and patreons yes thank you so much
yeah patreons you really do make these
videos possible
um which we say every time and i know
you get bored hearing it
but it's important it's important to us
and we really
genuinely mean that yeah we do we've had
a couple of people buy us a beer
um thank you yeah thank you you know who
you are i'm not gonna
i'm not gonna list everybody's names but
you know who you are and
uh they went a lot of them went to our
website and picked up the free
information that's on
svmpavidus.com um
the what was it it was the engine
service list our engine service list
yeah
things to check well until next time
take care take care and say sales safe
because nobody's allowed to move at the
moment
and uh it's bye from us and bye for
moscow are you gonna say goodbye oscar
no no it's not okay bye bye