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Old 12-09-2020, 10:07   #1
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Join Date: Oct 2010
Location: TX
Boat: Whitby 42
Posts: 228
Raw water strainer thread failure

The attached photo shows some of the threads breaking off on the body of the A/C raw water strainer. Some parts are so brittle you can break them off with your fingers. Any thoughts a to the cause? A/C was installed 6 - 7 years ago and I assume the strainer was put in at that time.
Since it's below the water line, having the threads fail could be serious.
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Old 12-09-2020, 10:17   #2
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Join Date: Sep 2019
Location: Bellingham, WA
Boat: Grand Banks 36 Classic
Posts: 12
Re: Raw water strainer thread failure

Some plastics are incompatible with some oils... it looks to me like someone may have put lube on the threads that caused the plastic to craze and fracture.

For below-the-waterline filters I'd recommend changing to a bronze body filter of reputable brand (Groco or similar). I definitely would retire that one ASAP!
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Old 12-09-2020, 10:27   #3
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Re: Raw water strainer thread failure

The lube thing is a possibility, there have been some strange things done to this boat. That strainer is definitely not going back in. The two A/C units are the only ones with the plastic strainers. Space wise it might be difficult to put in one of the bronze strainers. Putting in a Shurflo for the time being.
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