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Old 07-06-2016, 07:11 AM   #1
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How to know which strainer gaskets?

I have 4 of what I was told are Perko sea water strainers in 2 different sizes. I can't find any stamped numbers on the bronze castings; there were apparently labels on the glass but they're long gone. How can I ID these to make sure I'm buying the right gasket kits? Just measure the diameters and buy whatever's close? Thanks.
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Old 07-06-2016, 07:17 AM   #2
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I have 4 of what I was told are Perko sea water strainers in 2 different sizes. I can't find any stamped numbers on the bronze castings; there were apparently labels on the glass but they're long gone. How can I ID these to make sure I'm buying the right gasket kits? Just measure the diameters and buy whatever's close? Thanks.
Take pictures and measurements and match them up to the pictures and specs you should find online at Perkos web site.
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Old 07-06-2016, 11:27 AM   #3
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Perko casts their name onto everything they make. Should be on the cap and the pipe size in inches near both ports. If if don't say Perko, it aint Perko.

The gasket kits are available in both cork and neoprene, get the neoprene.

Otherwise the pipe size is the determining factor for the strainer size, so look for an indication on any of the pipe fittings or hoses or measure.




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I have 4 of what I was told are Perko sea water strainers in 2 different sizes. I can't find any stamped numbers on the bronze castings; Thanks.
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Old 07-06-2016, 03:37 PM   #4
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If you have the old one, run down to your local fire department and see if you can mooch new hose gaskets from them. They are super durable and resist just about anything and you can probably get them for free. There are so many sizes of hose now that unless the diameter is weird they can probably fix you up.
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Old 07-06-2016, 03:50 PM   #5
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ACE hardware makes a little gasket kit that has three types of material about 5" by 5" squares. Cut your own out of the maroon one. Keep the rest for other gasket needs as spare for future use.
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Old 07-07-2016, 12:48 PM   #6
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Thanks, all. Looking closer, two are Perkos and I can find the right kit for them.

The other two have no markings except a design on the caps that looks like a mainsail. I've Googled various sea strainers and haven't seen a match yet. I'll try to post a photo later.
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Old 07-07-2016, 01:30 PM   #7
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In the past I've replaced the gasket completely by cleaning out the groove/valley that the gasket sits in on the lid and then filling that valley up to its edges with silicone. Let it harden up, there by forming a permanent gasket.
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Old 07-07-2016, 03:39 PM   #8
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In the past I've replaced the gasket completely by cleaning out the groove/valley that the gasket sits in on the lid and then filling that valley up to its edges with silicone. Let it harden up, there by forming a permanent gasket.
Interesting, thanks! One of the few uses of silicone I'd consider on a boat.
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Old 07-07-2016, 06:41 PM   #9
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So here's one of the caps from the two non-Perko strainers. The design is the only visible mark. I feel like I should recognize it but don't.
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Old 07-07-2016, 09:38 PM   #10
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Groco
Buck Algonquin
Perko
Wilcox crittendon. Now gone unfortunately.
Spartan marine

I,m sure there are others.

You might also send them the photo you showed here to see if it is an older model or if they recognize the mfgr. Emblem.
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