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2THDIVR
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First Name: Scott
Location: Venice,FL

Alkin = Bauer Filter

Fri Jun 10, 2022 3:23 pm

Are the Alkin P-21 filter for the W-31 and the Bauer P21 Triplex filters fits most small Bauers the same?
Can I use the Bauer filters in an Alkin?
Lenght and dia are the same.
Thanks for any help.

Scott

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fishnbeer
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Joined: Fri Jun 07, 2013 5:19 pm
First Name: Jerry
Location: Nor Cal

Re: Alkin = Bauer Filter

Sat Jun 11, 2022 2:09 pm

Hello Scott
I have been using the Alkin aluminum P21 filter in my Bauer Purus triplex filter for a couple of years now without any issues. I believe the Bauer and Alkin p21 filters are the same size, so either should work in your Alkin. I like the ability to repack my own filter to save some money.

Jerry

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2THDIVR
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First Name: Scott
Location: Venice,FL

Re: Alkin = Bauer Filter

Sat Jun 11, 2022 4:34 pm

Jerry

Thanks for the info.
Have the aluminum Alkin that I'm repacking.
Just wondering for the future.
There's a $8 difference between the 2 at Filter Techs.

Scott

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SurfLung
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Location: Alexandria, MN
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Re: Alkin = Bauer Filter

Tue Jun 21, 2022 3:30 pm

Thanks for the info... I just ordered one pre-packed filter for the Bauer P21/X21 and one for the Alkin P21/X14... The Bauer was $37 and the Alkin was $45... Ordered from Filtertechs. So, I'll have them side by side to compare and will post my results here. I'll be using them on my Alkin Vertical W31.
SurfLung
The Freedom and Simplicity of Vintage Equipment and
Vintage Diving Technique are Why I Got Back Into Diving.

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2THDIVR
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First Name: Scott
Location: Venice,FL

Re: Alkin = Bauer Filter

Tue Jun 21, 2022 7:26 pm

Just ordered a Bauer filter with an air test kit.
Want to see how good my repacks work.

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2THDIVR
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Re: Alkin = Bauer Filter

Mon Jun 27, 2022 4:21 pm

Got my air test results.
Was wondering how my repack would do.
Came back with better test results than the Alkin filter.
Did get a Bauer filter to test for fitting the Alkin.

Scott

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SurfLung
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Re: Alkin = Bauer Filter

Thu Aug 11, 2022 4:40 pm

Good News and Bad News of Lawrence Factor Filters for the Alkin...

I ordered the LF filter for the Alkin 32 and I also ordered the filter for the Bauer 21. They are identical except the Bauer has a metal nozzle and the Alkin has a plastic one. So as far as I can tell, they will both work on the Alkin.

The Bad News... They didn't put that handy blue strip in either of them. So, you can't just look at the strip to see if your filter is used up.

The Alkin manual says to change the filter media after 50 hours or 3 months... whichever comes first. I've been using mine for 3 months but only have 16 hours on it. Real easy to change. I have not tried re-packing the original metal filter housing. But I have a re-pack kit from Alkin and it is about half the cost of the LF filters. I also have the bulk filter media and will certainly try that at some point.

AlkinFilters01.jpg
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SurfLung
The Freedom and Simplicity of Vintage Equipment and
Vintage Diving Technique are Why I Got Back Into Diving.

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2THDIVR
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Joined: Sat Jan 02, 2010 4:01 pm
First Name: Scott
Location: Venice,FL

Re: Alkin = Bauer Filter

Thu Aug 11, 2022 7:22 pm

Here in Florida with the humidity I'm getting about 20 - 25 hrs. on a filter, in my Alkin.
A little more maybe 30, during the winter months.
50 hrs. maybe if it was cool, drier air from inside the airconditioned house
Ya, No moister strip in the filters I have received.

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antique diver
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First Name: Bill
Location: North-Central Texas

Re: Alkin = Bauer Filter

Fri Aug 12, 2022 10:01 pm

About the moisture strip that we all relied on for years...
It's not as foolproof as was once believed. Turns out that it is common for larger volumes of incoming air to channel up through the central portion of the drying media, causing it to adsorb more moisture than the outer most area. The test strip can remain blue even though the central portion of media is getting moist due to more air volume (and its moisture load) passing through it. Some filter cartridge manufacturers are leaving the strip out because of the potential for it giving an inaccurate blue color reading.

A small moisture sensor device installed just downstream of the main filter tower gives a much more accurate estimate of the moisture content of the treated air. These cylindrical devices are typically about 3 to 4 inches long and about 1.5 inches in diameter, and have a thick clear view port. That port gives a view of the same type of moisture indicating paper, showing up as blue when the air is appropriately dry, and fading to tan or white when moisture is greater than desirable for diving use. Prices can vary but I see them anywhere from 50 to $70 range. They work well, and have the added advantage that you can check the air moisture content any time without opening up the filter tower and removing the cartridge for a view.
The older I get the better I was.

h2operations
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Location: Coronado CA

Re: Alkin = Bauer Filter

Sun Aug 14, 2022 11:51 am

THANK YOU.
I have been sitting here on the sidelines listening and watching. I have stepped off the ladder a picked up a compressor. Thank you for the real time info.

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antique diver
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Re: Alkin = Bauer Filter

Mon Aug 15, 2022 12:29 pm

h2operations wrote:
Sun Aug 14, 2022 11:51 am
THANK YOU.
I have been sitting here on the sidelines listening and watching. I have stepped off the ladder a picked up a compressor. Thank you for the real time info.
What compressor did you get?
The older I get the better I was.

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