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Master Mariner
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I've found that a standard broom handle will do nicely to clean my a/c lines. I've tried pool chlorine tabs for pools in the sea strainer, but it wasn't terribly effective and probably not the best for the environment.
The only sure fire way to keep the circulation lines for refer and a/c systems is an ozone set up. Not too expensive and pretty easy to do, but it will necessitate some creative thinking.
 

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Old as Dirt!
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The water hose going from the seacock to the strainer is getting hard growth built up inside it. It necessitates removal, lots of banging, and rinsing. I used standard reinforced water hose. Is this the wrong product?
To clean your raw water intake hose, simply close your thru-hull seacock and pour a cup full of RydLym/Barnacle Buster or for that matter CLR into the hose and and allow it to sit over night to dissolve the growth in the main body of the hose. Once you've done that, open the thu-hull and add a few more cups of the solvent to you hose every day for a few days which will pretty much dissolve the matter between the seacock and the strainer.

Once the hose is cleaned out, go by West marine and purchase a short length of copper grounding foil. Cut a triangular piece about an inch wide and two or three inches long and roll it tightly into a short tube around a bamboo skewer. Remove the skewer (of course), drop it into your hose and push it gently down to your strainer with a pre-measured length of dowel. As the foil dissolves it will prevent growth in your raw water line. Replace the foil every few months.
 
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One of None
Hunter 34
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To clean your raw water intake hose, simply close your thru-hull seacock and pour a cup full of RydLym/Barnacle Buster or for that matter CLR into the hose and and allow it to sit over night to dissolve the growth in the main body of the hose. Once you've done that, open the thu-hull and add a few more cups of the solvent to you hose every day for a few days which will pretty much dissolve the matter between the seacock and the strainer.

Once the hose is cleaned out, go by West marine and purchase a short length of copper grounding foil. Cut a triangular piece about an inch wide and two or three inches long and roll it tightly into a short tube around a bamboo skewer. Remove the skewer (of course), drop it into your hose and push it gently down to your strainer with a pre-measured length of dowel. As the foil dissolves it will prevent growth in your raw water line. Replace the foil every few months.
SV! Now that is Slick!
 

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Master Mariner
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9,220 Posts
Once the hose is cleaned out, go by West marine and purchase a short length of copper grounding foil. Cut a triangular piece about an inch wide and two or three inches long and roll it tightly into a short tube around a bamboo skewer. Remove the skewer (of course), drop it into your hose and push it gently down to your strainer with a pre-measured length of dowel. As the foil dissolves it will prevent growth in your raw water line. Replace the foil every few months.
Considering that all a/c units today use aluminum coils do you think this might cause those coils some electrolysis problems?
 

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Most AC system cooling water Heat exchangers are are either Copper-Nickle or Monel (copper alloys); the aluminum freon to air exchangers are usually electrically isolated from the cooling water so little to no galvanic action.
 

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Close the seacock frequently for 24 hours. The lack of oxygen will kill the hard growth before it establishes. Simple.
 
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