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Old 05-24-2016, 07:08 AM   #21
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First thing I'd do is get the entire system "acid" cleaned. There are DIY rigs you can do, or hire a professional. This is a regular maintenance item anyway. Next check the hosing between pump and condensing unit. Are there any dips? It should be uphill all the way. Otherwise you will be prone to air locks and loss of prime.

You can get pump refurb kits from Depco Pump in Clearwater, FL, as well as expert advice.
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Old 05-24-2016, 07:12 AM   #22
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Really like the external strainer for eliminating that potential problem.

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Ted
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Old 05-24-2016, 07:30 AM   #23
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Had a jellyfish sucked into mine. That was hard to clear out even using a water hose. I have had jellyfish clog every through hull over several years for engine, and generator too.
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Old 05-24-2016, 07:48 AM   #24
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Really like the external strainer for eliminating that potential problem.

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This seems like an excellent idea, unless it reduces water flow too much.
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Old 05-24-2016, 08:17 AM   #25
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First thing I'd do is get the entire system "acid" cleaned. There are DIY rigs you can do, or hire a professional. This is a regular maintenance item anyway.

For CD:

Pretty easy to DIY. On an AC system, just pour the "stuff" into the sea strainer (valve on thru-hull closed) while your AC pumps sucks it through the system. Once the system is fully loaded, let it sit for however long the "stuff" recommends. Repeat if necessary, but when finished... close up the sea strainer, open the valve, fire up the AC to flush... done.


It's only slightly ore difficult to cobble together a recirculating system, but capturing AC discharge for recirculation doesn't seem worth the effort.... for an AC system.


I've used Rydlyme (the "stuff") but apparently Barnacle Buster, Triton Marine's product, etc. all seem to work fine.

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Old 05-24-2016, 08:24 AM   #26
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This seems like an excellent idea, unless it reduces water flow too much.
They come in different sizes. That one (on my trawler) will work with 3" seacocks and over 60 gallons per minute water flow. Should be ok for your AC pump.

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Old 05-24-2016, 08:28 AM   #27
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Oh yeah. That's big. Cool! Thanks!
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Old 05-24-2016, 08:29 AM   #28
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For CD:

Pretty easy to DIY. On an AC system, just pour the "stuff" into the sea strainer (valve on thru-hull closed) while your AC pumps sucks it through the system. Once the system is fully loaded, let it sit for however long the "stuff" recommends. Repeat if necessary, but when finished... close up the sea strainer, open the valve, fire up the AC to flush... done.


It's only slightly ore difficult to cobble together a recirculating system, but capturing AC discharge for recirculation doesn't seem worth the effort.... for an AC system.


I've used Rydlyme (the "stuff") but apparently Barnacle Buster, Triton Marine's product, etc. all seem to work fine.

-Chris

I happen to have a little Rydlyme handy. Think I'll do that.
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Old 05-24-2016, 09:53 AM   #29
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The external strainers are great for engines, not so great IMO for something like AC that is used a lot when stationary. Even with anti-fouling applied, they are prone to barnacles and other growth. You can keep much of that at bay in an internal strainer by putting a small scrap of copper piping in the strainer.

Recirculating does a much better job of cleaning the AC system and depending on access to the condenser unit output, pretty easy to rig. You'd be amazed at the extra gunk it will get out once you think you've cleaned it the other way.
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Old 05-24-2016, 11:11 AM   #30
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George is right. If you are going to use that style of strainer on an A/C thruhull I would use this type.
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Old 05-24-2016, 10:38 PM   #31
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Not a big deal. Pull two 1/4"-20 screws and the screen slides out for easy cleaning.

Ted
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Old 05-25-2016, 07:44 AM   #32
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George is right. If you are going to use that style of strainer on an A/C thruhull I would use this type.
Bill: That looks interesting. Who makes/sells them?
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Old 05-25-2016, 11:11 AM   #33
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Old 05-25-2016, 12:50 PM   #34
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I like to have a bronze tee above the thru hull with a NPTF plug straight above the thru hull and the hose splitting off at 90 degrees. The plug can be pulled to provide a straight shot for a dowel rod to punch out any growth without pulling the hose. No exterior strainer.
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Old 05-25-2016, 02:18 PM   #35
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One easy trick to help out the acid treatment is to cut your pump ac cord and install a 110 ac outlet and add a plug on the pump side. Under normal conditions the pump is plugged into the outlet, which leads to the AC control box that cycles the pump when the thermostat fires up the air conditioner. When you need to service the system you unplug the pump, fill your strainer with barnacle buster, full strength. Open thru hull and plug your pump into an AC source for about 20 seconds then unplug and let sit for an hour or two. Make your hook ups regular and fire up your air conditioner. There, all done. Could add food coloring to the strainer with a lookout to tell ya when the water changes to know when to unplug.
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Old 05-25-2016, 02:59 PM   #36
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I like to have a bronze tee above the thru hull with a NPTF plug straight above the thru hull and the hose splitting off at 90 degrees. The plug can be pulled to provide a straight shot for a dowel rod to punch out any growth without pulling the hose. No exterior strainer.

That's a good idea. My valve has a 90 to be able to clear an obstruction on it so I couldn't rig that up. I couldn't use my water hose method if I was anchored out obviously.

How often do y'all experience an AC intake clog? This is the first time it has happened to me in two years, and it happened twice in one night for some reason sitting in a marina. Maybe too much trash floating around maybe?
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