series versus parallel if you can get a pump
and drive that pump with a motor engine that'll make
two gallons per minute two gallons of water per minute being pushed through
that pump at 800 psi then you can have more than one membrane
you can have two i've got a pump that does uh 4.2 gallons
per minute so i can have four membranes now
i could go with the larger membrane the the 4-0 but i like going with the
smaller two five these are sw 25
2.5 inch diameter 40 40 inches long membranes and they work great for me
because if one of them fails i can just take the membrane out put a plug in the
the pipe that drops this the fresh water out
and just let the salt water flow through that or i can move hoses around anyway
i can use less than four membranes and it will still
be able to make water which is much better than not being able to make water
so smaller membranes for may work out well and if that's even too big for you
uh you know you'll have one then you can even get a 20 inch long but these 40s
are well sold so i recommend them highly so
you're down to i got two membranes do i put them in series or do i put them
in parallel and i always do i let the water flow through both of them
and they go back together or do i let it flow through one take off the product
water and let that salt water that's coming
out the end of this one just feed into the next one
now you're thinking oh that's terrible because this one has to deal with the
water that's now saltier because this one took out some
of the fresh water yes that's true but but it's only a little bit true
you're starting off with water that may be
oh 35 000 parts per million that's the total dissolved solids that's sea water
that's the the salts and the magnesium and the
calcium and all the other stuff that's in salt water
so you're going to take out about a half gallon of water from that flow
and you're going to make that flow about 2
700 more parts per million saltier well so it's saltier yes but in
the grand scheme of things at the end of four
membranes that's only about 46 000 parts per million coming out
it's dropped from 96 water to 95 percent water it's still
mostly just water and you're thinking well how do you know that well
i didn't i was going to put a melon in parallel but series
actually is the way to go brian a guy wrote me and he does this for a living
he designs water purification systems for
corporations and companies and big installations and so
he knows his stuff most of this is done on software now and
when you look at the plants they'll have like a dozen filters in series
and then lots of those in parallel and then they'll take the concentrate out of
that and they'll run it through some more
uh membranes that are in series so it's all computer generated now we're only
dealing with four in series and here's the real reason why
you want to put them into series it's the flow across the membrane
and it's that flow that scours off the salts and magnesium and calcium and
everything else that builds up that's trying to clog those pores that
my water needs to go through so the better the flow up to a maximum
of six gallons of water per minute that's what scours
that off and keeps your membranes clean so if you put them in parallel
you might make more water right off the bat
but they're soon going to get fouled up so
you're going to make less water in the long run put them in series
you'll have a membrane that'll stay as clean as it possibly can for a
longer period and the cleaning process in the membranes guess what
flow a lot of water across them not at high pressure but a lot of volume
upwards to the six gallons per minute max and that's a reason to avoid those
bigger four inch membranes because they'll need a lot
more flow to do cleaning on them and that's really where the cleaning
process comes in it's about flowing a lot of water across the membranes not
above the max 6 gallons per minute but my little feed pump does 5.5 gallons
per minute it's not about a high pressure because we're not trying to
make water we're just trying to scour the outside of the membranes
and carry off all that salt and deposits and build up
and we do that once a week we keep good operating
membranes for years to come i've been working on plumbing at all so let me
take you down and show you that alrighty i think that's it well it's
going to change i know it will and it's more complicated than it needs to be
because we're going to use it as a pressure washer as well as a water maker
and we've got different ways we can run water into it
so we'll explain it later i'm really just laying it out so i can see how i
get it into the boat i need a couple of tanks too because i'm
going to take some of the product water and then flush back through it and those
are the tanks that hold that there's also gonna be an alarm
on there to tell me that i'm almost to the end of the cycle and whereas
these tanks start filling after my boat tank is filled so
that'll be there i gotta get them in i gotta get the filters in
probably want to leave room for another filter because i can see a reason why to
have one you know like we're reprocessing the
water that's in our tank i may want to pass it through a membrane filter before
i bring it in here because i have a paint chip or something in it and i
don't want that going into the high pressure pump so
there's still things to think about and modify but i'm happy with it now i got
to figure out how to arrange this and the boat and build
mounts for these and i'm going to have to buy more parts because some of this
is put together with bubble gum and tape right now
just so i can see it they're 16 inches
well i don't want to move these pumps around inside the boat they're too heavy
so hollywood pumps you know if i'd get the boxes i could have glued them
together and that'd work too
well i could put them way up high you know what the higher i put this thing
the easier it is to reach the valves i'm not going to go back in there anyway
that's just an exhaust pipe we'll insulate that then we're pretty
much done back in there
this is going to be one of the stranger
brackets
now i'll say it again welding is not hard
aluminum welding you hear people oh i want a welding hard welding
maybe in 1950 it was but it's not anymore this is aluminum spool gun
it's the easiest welder i got look at this james came by and he paid me a
visit that's his first weld he's ever made
with an aluminum welder all right that is his second weld that
he's ever made that's how fast you can learn with this
thing so don't let those old farts say oh aluminum welding hard to do it scare
you okay because they're wrong really really
wrong now this isn't the cheap setup but you can go down to harbor freight and
buy yourself a stake machine and be stick welding in no time and make
your own brackets and you don't have to hire that stuff out
a stick welder and some stainless steel sticks and plate
a grinder to cut with and you can be in business for
shoot under 150 bucks
so why did i take aluminum it's because it's
laying around it's fast it's easy i don't have a sandblast that i don't have
to paint it it's lovely stuff and it won't be long
before you're doing wells like that so when somebody tells you you want to
leave that to professionals consider where they might be making their money
well i'd like to say that it's close but it is not
but it's in the ballpark
okay
so
alexa what's the temperature right now it's 99 degrees fahrenheit it's hot
tonight expected but i'm done making brackets in here
the two pre-filters will go out here i'm just going to bolt them in but
i'm going to get the fittings in here before i decide exactly where and then
the two product water tanks are going to go back
behind there you fill them up with product water at the end of the run
and then you run that water across the membranes instead of salt water
and that just cleans them out and helps keep down growth in there so we're ready
for all that so now i know where everything's going
to go in i need to go back and modify my fittings a little bit
because i need a 90 to go there so we'll have to order a few more little
pieces there's always a few little more pieces let me show you the pump though
we'll need a few fittings there too but it's ready to be put together
this is called a hollow shaft pumps just because the shaft is hollow
and the shaft from the motor goes right up into it there's a little key in the
keyway there and that's what locked the two together
and if you buy this combination they'll probably come to you
separately so you'll need to bolt the pump onto the motor there's nothing
really to be done about that lobar to be some grease on that keyway
down there and your motor and pump may not slide together
perfectly because that ring in there they will fit
but the first time may take a little bit of effort so
snug all four of your bolts down and then tighten them slowly
and it will push the pump and motor together it'll be fine
and my pump and motor here is selected because i'm running four membranes if
you're not running four membranes you really don't need a pump this big so
you go something smaller the really the interesting criteria is how much
power do you have to push the motor i have two four kilowatt inverters
that run off separate battery banks and i have two generators an 8k
and a 10k so the generators have no problem with this but the inverters at
4k may have an issue starting this motor so
if you're going to select your own motor try to get something that at least has
start capacitors on it this one has three capacitors in here
i'm sure there's a start and run capacitors in that combination i'm not
sure how they wired it that's above my pay grade but capacitors
help the motor kick and run all they are is like batteries
that can dump their energy really quickly
so you want probably a motor that has that a motor that's
uh rated for whatever the electrical current you're going to have is i have
110 i have 220 and three phase two but the
deal is i only have one generator that does three phase
i have two generators that do do 20 but everything i have does 110 so i'm using
a 110 motor that way if i have a failure on one
system i can just move it and power it from another system
actually i don't have to move it to just throw a switch so think about what
generator you have on board and what you carry around with
you what your solar panels and inverters can do
and try and size a system that'll work for you
even better if you can work with more than one power supply
i can replace the whole motor for about 400 bucks but the whole unit
motor and pump cost me 1200 and that's a really good price from
edi and then i bought all the rebuild kit
for this pump and that's about four kits they're all listed on the website it'd
be about 250 dollars for all the kids to rebuild this section of the pump
but that's your pistons and your intake valves and the high pressure valves and
the seals and that's one of the things i really
like about this cat pump is six bolts you can take the whole thing
apart and rebuild the pump and you may decide to go without
the spare parts because these things really will
last it's all 316 stainless steel if you flush fresh water through it get the
salt away from it it'll last even longer so it depends on
how well you take care of it now you don't have to power this off of
ac obviously there's lots of different choices this
is a pump with a hollow shaft so it mates up real easy but you can get one
with a normal shaft bolt it to a frame put a pulley on it
put a gasoline engine or a diesel engine you know 10
horsepower would be plenty for a lot of water and then you could even
put a pulley on it that is a clutch pulley and there's electric clutch
pulley so when you flip a 12 volt switch it
engages the pulley just like your car air conditioner does
and that pulley can then be tied with a belt
to your primary engine and so when you're running
motor sailing or motor boating then you can just flip that on and power your
pump off that now the change you do need to make if you're
running off an engine that's rpm's going to vary
is you can't use a needle valve for the high pressure release
you need to use a regulator that can be set for the pressure
a couple more hundred dollars there but you're not paying for a motor or an
engine so you got a little bit more to spend on the regulator and the electric
clutch so you'll come out pretty good on that
i could have powered off my main engine but the thing for me is i had the
redundancy if i went through the electric systems where if i power
off the main engine i'd have to take it off the engine and find a
gas powered motor so it's a little harder for me to get back into business
at least i think it was a good option for me it's like
will that four kilowatt inverter pull this motor when a motor starts it
pulls a lot more amps than it does when it's running
at 110 volts what would be right here on the label 115 volts right there
the next line down is amperage that'll give us 20.8 amps of draw
at 230 volts see it drops down it's only 10.4
i'm going to be running about 110 so i'm going to be pulling about 22 amps
alexa 110 times 22. 110 times 22 is 2 420. so about 2500 watts
and my inverters do 4 000 watts so it should work
and if it doesn't we'll cross that bridge when we get to it so many people
solve problems that may have never actually become a problem
but you can get variable frequency drives and soft start units to add on
if you need a little extra kick to get the motor going the only maintenance you
got to do these pumps is put some oil in them for god's sakes do not start them
without oil in them the oil goes in here and you got a
little sight glass down there even from the side you can see the level of oil
right after 50 hours of use drain it all out put another load in you
can get a quarter of this for about 12 bucks even home depot sells it
if you're in a pinch it's a probably a hydraulic oil
yes iso 68 which is a hydraulic oil you get it a lot of places but
it's not going to be food grade when you get it from the tractor store
now if you're looking at this setup and thinking oh my god that's a lot of parts
yes it is but you really don't need this many i mean i'm using this as a pressure
washer and i'm using the lift pump that salt
water pump down there as a supply for the rest of my boat
where i have salt water hoses for wash down
so it can't be simpler so now i know basically how this thing is going to go
together i'm going to start getting the fittings
i really want to use because i really don't want to use brass
in here just because i want to stay with stainless steel
i'm going to use plastic and schedule 80 this
thick stuff where i can on the input side this is the low pressure side and
on the high pressure side i'm using stainless steel fittings 316
and these are the 3000 psi valves they'll call them pound 3000
when you go out to buy them and for the low pressure side i'm just going to be
using you know cheapy stainless steel ball valves
now your inlet here is only 3 8 inch but i'm bringing that up to half
inch because the manual tells you if you start with this pump you can create
cavitation and cavitation will tear it up pretty quick
they suggest one of the solutions is just go up a size on the
on the supply line so that's what i've done i just started off that way and
these outputs are quarter inch but i went ahead and went with
3 8 inch hose just because i don't want the pressure drop
i don't think it'd be an issue but the cost between quarter inch and
three-eighths inch hose is minor and when you buy your parts make
sure not to choke it down too much this is not a full port ball valve it's
a half inch valve but look at that porter in there that thing's tiny
this is a full port ball valve big hole going through it that's full
port i could start putting it together but there's a few changes i want to make
i want to put a little turn right here in this because i can't get my hydraulic
line in there without bumping into the electrical housing and
i want to put some unions here so that i can easily take the pump
away by just disconnecting the unions and i don't have to unbuild everything
going back to these fittings so i'm going to get some new parts and
we'll come back when the new parts get here
in the next video we're going to complete the installation of all these
parts into the boat
you