I put together a filter system for a remote source pressure demand face
mask that I use when spraying 2 part LPU. All from modular Speedair
filters from Grainger. It starts with a general purpose
separator/filter then a regulator, then a coalescing filter to remove
oil and another general purpose filter with a carbon element to grab any
remaining VOCs. Same series as used on a $2K MSA air source for a total
cost of about $120.

With a little oilless compressor on deck it would make a very acceptable
air source for bottom cleaning.

Jim Woodward wrote:

We met an interesting and inventive guy on our trip through the Panama Canal
who dealt with this by making his own electric hookah -- take one Jabsco
diaphragm bilge pump, attach hose and a SCUBA mouthpiece and presto, you
have cheap device that will work down a few feet. You want a diaphragm bilge
pump, not a pressure water pump, because the former is relatively high
volume, low pressure.

We used a "real" hookah from Brownie for work on the boat. Vast overkill.

For Fintry, I'm thinking about using a commercial oil-less compressor
(Porter Cable, for example) which will run air tools and, through a filter
(same filters we use on our tank-fill compressor) drive a low pressure hose
for use down to ten feet or so.



--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

"Lloyd Sumpter" wrote in message
news
Hi,

Whenever I need to work on my prop, etc. underwater, I've just slapped
on the mask and fins and held my breath. But I've always wondered: why not
rig up a hose arrangement to be able to breathe? We're not talking 50-ft
depths here, so I'd think it would be pretty safe. Perhaps some kind of
non-collapsable hose on the end of a snorkel?

Does anyone do this? Why or why not?


Take a look at the hookah equipment, cheap and cheerful, but recommend you
do a dive training course before use.

http://www.akmining.com/dive/systems.htm

garry

We met an interesting and inventive guy on our trip through the Panama Canal
who dealt with this by making his own electric hookah -- take one Jabsco
diaphragm bilge pump, attach hose and a SCUBA mouthpiece and presto, you
have cheap device that will work down a few feet. You want a diaphragm bilge
pump, not a pressure water pump, because the former is relatively high
volume, low pressure.

We used a "real" hookah from Brownie for work on the boat. Vast overkill.

For Fintry, I'm thinking about using a commercial oil-less compressor
(Porter Cable, for example) which will run air tools and, through a filter
(same filters we use on our tank-fill compressor) drive a low pressure hose
for use down to ten feet or so.


--
Jim Woodward
www.mvFintry.com



..
"Lloyd Sumpter" wrote in message
news
Hi,

Whenever I need to work on my prop, etc. underwater, I've just slapped
on the mask and fins and held my breath. But I've always wondered: why not
rig up a hose arrangement to be able to breathe? We're not talking 50-ft
depths here, so I'd think it would be pretty safe. Perhaps some kind of
non-collapsable hose on the end of a snorkel?

Does anyone do this? Why or why not?

Lloyd Sumpter
"Far Cove" Catalina 36

Subject: Cheap And Nasty Snorkel extension
From: "Lloyd Sumpter"

Hi,

Whenever I need to work on my prop, etc. underwater, I've just slapped
on the mask and fins and held my breath. But I've always wondered: why not
rig up a hose arrangement to be able to breathe? We're not talking 50-ft
depths here, so I'd think it would be pretty safe. Perhaps some kind of
non-collapsable hose on the end of a snorkel?

Does anyone do this? Why or why not?

Try it and let us know how it works. :-)

Capt. Bill

Subject: Cheap And Nasty Snorkel extension
From: "Lloyd Sumpter"

Hi,

Whenever I need to work on my prop, etc. underwater, I've just slapped
on the mask and fins and held my breath. But I've always wondered: why not
rig up a hose arrangement to be able to breathe? We're not talking 50-ft
depths here, so I'd think it would be pretty safe. Perhaps some kind of
non-collapsable hose on the end of a snorkel?

Does anyone do this? Why or why not?

Try it and let us know how it works. :-)

Capt. Bill