Eheim 1262 issue

[sermormo]

Hi everyone,
I have an issue with an Eheim 1262 pump that I installed a couple of day ago at my 65 gallons tank. The problem that I have with it is that when I turn off the pump or cut the electricity flow the pump start to sucking the water of my tank into my sump. I had bought a check valve to avoid this issue how ever with this valve I lose a lot of pressure. Could anybody help to solve this issue without the valve? Thanks

 

[hahnmeister]

check valves are a no-no. They eventually fail due to grime buildup, and your tank's water backflows into the sump. the best way to do it is with a HOB return or return plumbed close to the surface, then drilling a small... no more than 1/8" hole... into the pipe right at the water surface. This way, if your pump stops, the water in the pipe drains back out, but rather than drawing in tank water, it sucks in air and breaks the siphon.

 

[crumbletop]

[welcome]

I agree -- ditch the check valve. In addition to what hahnmeister said, you can position the outlets of your return close to the surface in the display which will break siphon. Also, _always_ make sure you have enough excess capacity in your sump to handle things should the return pump cut off.

 

[sjm817]

Agree. Put the return nozzle just under the surface.

[welcome]

 

[sermormo]

Thanks for yours answers,

However I cant put my plumb close to the surface because it is set up of this way:



Hahnmeister,
You wrote something about a HOB return, what is that? Could you please explain me a little bit more?

 

[Fishbulb2]

Looks like you are using a SCWD. Just drill a very small hole in the return lines just below the water surface. THen you can keep the rest of the return low like you have it. Those small holes will break the siphons. Can you do that?
FB

 

[sermormo]

Thank you very much, I am going to do tthat....

 

[miatawnt2b]

I would drill 2 small holes in each return just below the water level, on opposite sides of the pipe. That way if a snail is covering one, you can still break siphon.
-J

 

[sermormo]

Are you talking to make a couple of hole how does the pic show...

 

[hahnmeister]

You got it. you can put the holes just under the water level on both pipes. I say slightly under rather than just above because the little spray of water can be annoying if its above the water. I had one for a while like this that used to make an annoying 'drizzle' sound all the time, and then eventually built up enough salt/calcium deposits around the bottom of the hole so that it ended up shooting water out of the tank.

I spend I week trying to find that leak w/o a clue...lol.

Anyways, having it slightly under the water surface works fine... as soon as the pump goes off, the water level will drop a little due to the drains evening out, and the hole will be exposed in a few seconds.

BTW, HOB means hang-on-back, which is what you have. The altenative is a drilled return... as in... a bullkhead in the back of the tank where a hole was drilled.