throttling an eheim 1262 - The Planted Tank Forum
 
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post #1 of 11 (permalink) Old 10-01-2018, 01:46 AM Thread Starter
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throttling an eheim 1262

I bought an eheim 1262 to move water from my RODI barrel to my tank for easy water changes. Turns out the flow is too much and I'd like to throttle it down to 50%. I am a complete noob when it comes to plumbing. What do I need to do/buy to achieve this? A ball valve I assume but which one and what else to set this up? I assume I'd have to set this up on the outflow side?

thanks for any help!
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post #2 of 11 (permalink) Old 10-01-2018, 02:16 AM
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Put a ball or gate valve on the outflow side of the pump. A gate valve will be more expensive, but give you better adjustment control, but a ball valve will work fine.

Is the concern being the flow is causing too much turbulence inside the tank? If so, you could always design a diffuser to lower the turbulence.
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post #3 of 11 (permalink) Old 10-01-2018, 02:40 AM Thread Starter
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Yea my aquascape has a lot of sand and it's only a 55 gallon tank. it pumps out around 10-15 gallon a minute, I figured that's a bit intense. I'll be pumping the water onto some sort of plastic wrap to diffuse it a bit but I'd still like to throttle. Ball valve seems the way to go. Do you have any suggestion which one to buy in terms of size? Looks like the eheim has a 3/4" screw or something.
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post #4 of 11 (permalink) Old 10-01-2018, 03:34 PM
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From what I can tell, it'll take a 3/4" fitting. Purchase a 3/4" nipple fitting, a 3/4" threaded ball valve, and a 3/4" NPT Male hose barb fitting with the barb sized at the hose size your using. The nipple fitting goes into the pump, the ball valve attaches to the nipple, and the hose bib fitting goes into the ball valve.

If your unfamiliar with plumbing, and don't feel comfortable with purchasing the above items, take the pump to a local hardware store(or better yet, a plumbing store) and they'll most likely have someone who can help you out. Feel free to post if you have more questions.
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post #5 of 11 (permalink) Old 10-01-2018, 03:57 PM
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The Eheim fitting is not the standard pipe, garden hose or SAE thread fitting commonly found in the USA so I would not try and screw another fitting into the pump. If you aren't in the USA, you may be able to find the proper fitting but I wouldn't really bother.

What you could do is attach a short length of the proper size hose to the barbed fitting on the Eheim pump and then find a garden hose male mender fitting (like this one https://www.lowes.com/pd/Orbit-Plast...ender/50329563) to attach to the end of the hose on the Eheim pump.

Connect a garden hose to the fitting and run it to the aquarium. I prefer to use drinking water safe garden hose to fill the aquarium with water.

Use a garden hose shut off valve (like this one https://www.lowes.com/pd/Road-Home-Plastic-1-Full-Flow-Water-Shut-Off/1000457527) at the end of the garden hose to regulate the water going back into the tank.

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Last edited by deeda; 10-01-2018 at 03:58 PM. Reason: add info
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post #6 of 11 (permalink) Old 10-01-2018, 05:24 PM Thread Starter
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Thanks guys that helps a lot. I already have a hose attached to the eheim pump. Could I just add one of these as well at the end of the hose to regulate the flow?

https://www.bulkreefsupply.com/two-l...4be01f35f.html
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post #7 of 11 (permalink) Old 10-01-2018, 05:33 PM
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Some of the older style Eheim Pumps would not take standard USA pipe fittings. I have a 1260 Eheim purchased earlier this year, which has the same fittings as the 1262, and 3/4" fittings fit fine, assuming you live in the US.

deeda's method works also. But I would recommend adding a piece of hose, say 2 feet worth, beyond the shut off valve. If not, because of the higher pressure that the 1262 has, it could produce a jet of water as it's coming out of the valve. The extra length of hose with dampen this stream.

The Two Little Fishies ball valves from BRS will work also.

Last edited by Darkblade48; 10-02-2018 at 11:43 PM. Reason: Please use the edit function for back to back posts to keep threads cleaner
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post #8 of 11 (permalink) Old 10-01-2018, 06:22 PM Thread Starter
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great thanks guys! Fantastic info.
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post #9 of 11 (permalink) Old 10-01-2018, 07:51 PM
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Also it may pay to play around a bit with simple stuff. When we add any fitting that fits inside the tubing, we automatically will cut flow. Looking at a fitting that goes inside a 3/4 inch tube, the opening in the fitting gets really small and that small hole will cut flow. So maybe it will be good to just sti some fitting inline. Cheap and easy but not adjustable like a valve may be. But then stuffing an extra layer of media in a canister will also reduce flow. A clip to squeeze the tubing can also do it but then tend to be funky to keep adjusted.
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post #10 of 11 (permalink) Old 10-01-2018, 08:10 PM
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You didn't mention how far it is between the barrel and the tank but I find it best to keep the shut off valve at the aquarium so you can monitor the amount of water you are adding immediately.

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post #11 of 11 (permalink) Old 10-02-2018, 05:59 PM Thread Starter
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Quote:
Originally Posted by deeda View Post
You didn't mention how far it is between the barrel and the tank but I find it best to keep the shut off valve at the aquarium so you can monitor the amount of water you are adding immediately.
it's about 20 feet.
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