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post #1 of 13 Old 04-03-2012 Thread Starter
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New Sea Strainer - What kind?

Hello Everyone!

My partners and I are about to take ownership of a 1978 Catalina 30, and we have a punch list a mile long!
Top on the list is installing a Sea Strainer to protect that newly rebuilt Yanmar.
Defender sells a Shurflo strainer for $30 (Raw Water Strainer)

as well as the Groco for $110 (ARG-P Series Raw Water Strainer)

Is there any advantage to the Groco that justifies spending three times as much as the shurflo?

Thanks for your help....
greg
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post #2 of 13 Old 04-03-2012
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Re: New Sea Strainer - What kind?

I have the Shurflo and like it - see no reason to spend 3 times as much on a bronze one.

Brian
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post #3 of 13 Old 04-03-2012
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Re: New Sea Strainer - What kind?

"Shurflo's family of raw water strainers are built to keep your bait tank, livewell and wash-down pumps protected..). As long as they have a high enough flow rate to supply your raw water pump the Shurflo is probably fine (I'm a big fan of their pumps). I prefer the Groco though because I prefer not to have plastic in the raw water circuit (open through hull while on board), a bit of overkill on below water line systems reduces my tendency to worry about them.

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Re: New Sea Strainer - What kind?

Plastic shouldn't be a problem. A raw water strainer should be installed above the waterline so it can be easily cleaned without a flood.

On the other hand it is a Catalina 30 and I am not sure where it will be installed. It could possibly be installed in the galley sink cabinet above the waterline. Catalina 30's have the engine under the dinette settee just forward of the galley.

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post #5 of 13 Old 04-03-2012
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Re: New Sea Strainer - What kind?

Whichever one you use, hope you use one that's bigger than 3/4" for engine intake.

Roland
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Re: New Sea Strainer - What kind?

Blueman - yeah, im gonna use whatever the existing hose diameter is......i don't have access to the boat right now, so I was just using those links as examples of the manufacturers...

Mitiempo - I'm a bit confused about the advice from you and others to locate the strainer above the water line. Couldn't I just shut the seacock before cleaning the strainer, and thus avoid a flood? If that's the case, as long as I mounted it above the engine (ie - its the highest point in the system), there would be no water at all coming out when open, even if below the water line. Or am I missing something?

thanks again everyone!
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Re: New Sea Strainer - What kind?

All the boats I've owned and friends boats have a thru-hull scoop strainer, then a seacock and then a raw water strain. And their all below the water line, that's why there's a sea ****.

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post #8 of 13 Old 04-03-2012
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Re: New Sea Strainer - What kind?

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Couldn't I just shut the seacock before cleaning the strainer, and thus avoid a flood?
Yep, that's what I do. None of my raw water supply system is above waterline or above the engine.

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post #9 of 13 Old 04-03-2012
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Question Re: New Sea Strainer - What kind?

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Originally Posted by sfbaysailing View Post
Hello Everyone!

My partners and I are about to take ownership of a 1978 Catalina 30, and we have a punch list a mile long!
Top on the list is installing a Sea Strainer to protect that newly rebuilt Yanmar.
Defender sells a Shurflo strainer for $30 (Raw Water Strainer)

as well as the Groco for $110 (ARG-P Series Raw Water Strainer)

Is there any advantage to the Groco that justifies spending three times as much as the shurflo?

Thanks for your help....
greg
The total screen area appears to be much larger in the Groco. That Groco in the pic is like the one we installed over a decade ago. Easy to clean and totally solid; note the bronze top that unscrews with a gasket.

I would take that over a cheaper molded plastic one any day.

Of course, any strainer is better than none... but still, if you know you need a quality one for the long haul, why spend your money twice?


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post #10 of 13 Old 04-03-2012
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Re: New Sea Strainer - What kind?

The Shurflo strainer comes in different sizes, all much less than the Groco. Hose adaptors screw into the inlet and outlet to handle different hose sizes.

The reason to keep it above the waterline is that if the through hull becomes clogged you can remove the hose from the strainer inlet and using either a rod or a smaller hose clear it. If it is installed below the waterline that isn't possible without letting water into the boat.

I do not like having a scoop strainer on the through hull - just a standard mushroom fitting.

Brian
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