Modified strainer lid for flushing and winterizing - SailNet Community
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post #1 of 13 Old 11-21-2013 Thread Starter
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Modified strainer lid for flushing and winterizing

I've read a number of links that talk about modifying a strainer basket lid for engine flushing, so I thought I would give it a try. Success.

I modified the lid of a Vetus 330, both my genset and engine use this strainer. I drilled a 15/16" hole and then tapped it with a 3/4" NPT Pipe Nipple. I filed grooves down the length of the threads of the nipple to emulate a tap. $2. The idea was given to me by a gentleman at local home improvement store.

The modified lid works great and I was able to flush the engines last night by myself. The Yanmar 4JH5E took about 3 gallons, and the 7.5KW Onan about 1/2 of that, so 5 gallons could do both. Your mileage may vary. It took me longer to get the lid off of my genset strainer than it did to winterize it. I had to remove the ventilation hose to access it. PITA! I'm moving it to the lazerette next season.

I have a new lid and O-ring on order, part# FTR3301. I don't trust my butchered one as an actual working device now. It will get stored in the parts bin until next year, that is if I'm not in the Caribbean by then, in which case I won't need to use it.

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post #2 of 13 Old 12-01-2013
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Re: Modified strainer lid for flushing and winterizing

Is this a spare cover? If a spare where did you acquire same?
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post #3 of 13 Old 12-01-2013 Thread Starter
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Re: Modified strainer lid for flushing and winterizing

This was the original but I have since purchased a replacement, in fact I purchased two. One will serve as a true spare. VETUS INC VT FTR3301 - Vetus Inc Strainer Cover & O-Ring Only VT FTR3301 - Boaters Plus
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post #4 of 13 Old 12-01-2013
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Re: Modified strainer lid for flushing and winterizing

Clear polycarbonate and nylon strainer lids are subject to crazing by propylene glycol, and to a lesser extent, ethylene glycol. Add the stress introduced by the fitting screwed into a thin section not designed for threads, and cracking seems probable.

It would be safe enough if the modified lid were used and then the strainer left open, which is best for the strainer.

Thus, modifying the piping with a tee and a valve seems safer.


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post #5 of 13 Old 12-04-2013
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Re: Modified strainer lid for flushing and winterizing

Damn clever missingyou! I really like it.
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post #6 of 13 Old 12-04-2013
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Re: Modified strainer lid for flushing and winterizing

Just ordered my own strainer lid to do the same. I do not need to winterize as it is generally fairly temperate here but this will be great for doing flushes occasionally. Maybe get some vinegar running through the system on occasion. I have been looking at various solutions involving Tee junctions and such. This is simple and easy, like it!
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Re: Modified strainer lid for flushing and winterizing

This looks good, and I would not worry about crazing and cracking as you will only have this on for the winterization I assume. Almost as good as the Poopenator...
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Re: Modified strainer lid for flushing and winterizing

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Originally Posted by miatapaul View Post
This looks good, and I would not worry about crazing and cracking as you will only have this on for the winterization I assume. Almost as good as the Poopenator...
Yes! Only for winterizing. I considered tees and fittings as they would be nice to have, but it meant at least $60 in bronze (valves not included) for two engines, not to mention the cutting of hoses and such. Once winterization is complete and the modified Lid is removed the boat is as it was with the un-modified strainer lid.
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post #9 of 13 Old 12-23-2013
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Re: Modified strainer lid for flushing and winterizing

I completed my version of your idea. I will get some pics of it next weekend and upload them. Thanks for the clever idea missingyou!
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post #10 of 13 Old 12-28-2013
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Re: Modified strainer lid for flushing and winterizing

Here is my version of your great idea. I used my handy dremel to cut a hole large enough for the nylon adapter. I used a 3/4NPT to GHT adapter with two 3/4 npt nuts, a bit of 5200, a brass GHT elbow, taa daaa! I have been trying to come up with a flushing solution for RW for months, then missingyou provided me a great solution, thanks!

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basket , flushing , lid , strainer , winterizing

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