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Thread: Strainer for COR intake?

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    Strainer for COR intake?

    I have a COR-15 and a COR-20 that I am using as a submersible return pump. I would like to add a strainer to the intake. Are there any good off the shelf options? I don't have any restrictions for the COR-20 but don't have much space around the COR-15 and need something low profile. I am toying with 3D printing something but have a little hesitation placing the material in my tank and am also having trouble getting the threads to work. My test run of a 1.5" BSPP thread did not work. I could use the adapter and just insert the strainer or order a tap to clean up the threads on my printed part.

    Strainer.jpg

  2. #2
    Master Control Freak RussM's Avatar
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    What kind of filament are you concerned about? You can use PLA/PLA+, ABS/ABS+, PETG, or PET/PETT filaments like ColorFabb XT or Taulman T-Glase. No nylon.

    PLA is non-toxic, but supposedly will slowly degrade over time in saltwater. I have had PLA pieces (ATO low reservoir sensor mounts) in RO/DI water for many months and they show no signs of deterioration. ABS is what a lot of plastic aquarium equipment is made of. PETG and T-Glase are FDA-approved food-safe and non-toxic and do not degrade with immersion in water; I would not hesitate to use them. With that model (which looks quite nice!), I'd go with PETG or PETT due to the high strength of the prints.

    A transparent orange PETG or T-Glase strainer would be very cool
    I'm not a Neptune support rep. Please do not send me PMs with technical questions or requesting assistance - use the forums for Apex help. PM me ONLY if the matter is of a private or personal nature. Thanks.

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    Maker geeks has Raptor series pla that is FDA food safe and dishwasher safe up to 250 degrees. I have some battleship grey I got last week i am going to try.

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    Another idea to avoid buying a tap would be to print the part except have a short neck or tube coming out the back for the threads. If you have slots along the length of the threaded section, it would allow it to expand slightly and/or be bound on with something like a zip tie. That way if the threads are a touch off and either too tight or too loose the part would compensate some and still be usable.

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    Russ - Thanks for the recommendations on the PETG or PETT. The printers that I have access to can not use these materials but now I am shopping for my own printer.

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    This worked perfectly for my friend and is low profile:

    https://www.bulkreefsupply.com/low-p...strainers.html

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    FYI.

    The strainer for the Jebao DC9000 fits perfectly on the intake of the COR20. I happened to have one in my gear closet and gave it a try, perfect fit. I am not sure if it is sold as a replacement part......

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    Thanks for the info but I don’t have a Jebao DC9000.

    I did start my print this morning though. Only 20 hours to go!

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    I think the build is going to work. First real print with the machine. 17 hrs to go!

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    Part is soaking now to remove the support material. Should be ready to use by the end of the day.

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    Quote Originally Posted by Maximus View Post
    This worked perfectly for my friend and is low profile:

    https://www.bulkreefsupply.com/low-p...strainers.html
    I thought about using one of those on my COR-15 and still might but am concerned that it might restrict the flow too much. Would you ask him if he saw any reduction in flow?

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    Quote Originally Posted by Gotfrogs View Post
    I thought about using one of those on my COR-15 and still might but am concerned that it might restrict the flow too much. Would you ask him if he saw any reduction in flow?
    Strainers reduce flow similar to an extra 90 and sponge filters reduce flow similar to 2 extra 90s. For a typical 4ft head setup this reduces flow by about 4% and 8% respectively. The effect is less for high head systems coming from a basement.

    You might be an engineer if...You have no life and can prove it mathematically.

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    You think that is true for the low profile one linked to above?

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    Frequent Contributor zombie's Avatar
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    Quote Originally Posted by Gotfrogs View Post
    You think that is true for the low profile one linked to above?
    It's probably at least in the same ballpark.

    You might be an engineer if...You have no life and can prove it mathematically.

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    I just saw this, since I'm thinking of getting a COR-20. I was wondering what is the total open area of the strainer? If it's 2x to 3x that of the pump intake (3.5 sq" to 5.3 sq") I wouldn't expect there to be much resistance to flow, and it would also give you a larger surface area to clog before it started to affect flow.

    Good job on the strainer! I'd love to have a dual-head printer.

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    I would guess the ratio is much hurt than 3x. I will measure it in CAD. Here it is installed.

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    Quote Originally Posted by Gotfrogs View Post
    I would guess the ratio is much hurt than 3x. I will measure it in CAD. Here it is installed.
    WOW!

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    Quote Originally Posted by Maximus View Post
    This worked perfectly for my friend and is low profile:

    https://www.bulkreefsupply.com/low-p...strainers.html
    Which SKU number are you referring ? Many on this link. thanks

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    Is it possible you can make me one
    For the cor 20?

  20. #20
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    would hope to see one available from Neptune ....

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    1” slip, sku number 209049

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    No clue as he started using the strainer right when he got the pump. I do know that he has it on a low setting as it’s on a rather small 60g tank. He has the Cor 20 btw.

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    Quote Originally Posted by Gotfrogs View Post
    I would guess the ratio is much hurt than 3x. I will measure it in CAD. Here it is installed.

    Nice job! I'm just thinking about all the completely random stuff I could make with a 3D printer in my home office... I don't think I'd get any real work done.

    Does anyone know the reason why Neptune haven't released a strainer? It seems strange as the pump is intelligent enough to shut itself off if a snail or macroalgae fouls the impellor. Surely you would want to minimise the chances of that occurring?

  24. #24
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    I am loving my printer. It is running almost 24/7 for me making parts for my fishroom and new vivarium build.

    The lack of a strainer seems like an oversight to me.

  25. #25
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    you really wont have any restriction if your holes in the strainer equal more area than the intake of the pump. possibly the neck would be some restriction

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