1/2" to 0.5mm valve?
 

I have finally got an JBJ ATO (Yappy! Got tired of topping off). The pump that I got with it (maxijet 1200) has a 1/2" mouth. So I bought 1/2" pipe and fitted it with the maxijet and the other end on top of the tank (duh! :mrgreen:). Kept it outside water so that no vacuum suction occurs. But the flow from 1/2" is a bit too much for my tank so I was thinking of putting a valve in between and take a 0.5mm tubline out which will throw in water.

So is there any sort of valve for 1/2" in and 0.5mm out? Or which sort of valve do you guys recommend?

I am not turning on the pump till I get something to control the flow.

from 1/2 in to 0.5mm is a big restriction. I would buy the smallest pump I could.
You could always cap the end of the 1/2" pipe and drill a 0.5mm hole into the cap. But I bet you will be enlarging the hole pretty darn quick. Big back pressure on the pump!

If you are having issues with it pumping too much water - nevermind my post :smile:

If you are having issues with it because it splashes ...

Put a larger hose into the water that the output feeds through

The black hose is my ATO feed, and the clear 1/2" hose is under water a bit

http://i749.photobucket.com/albums/x...d/DSC01313.jpg

It takes a couple fittings, but MJ1200 to 1/4" can be done and will work fine.

I'll post how I did it when I get home from class.

Sent from my GT-I9100M using Tapatalk 2

I might be wrong about the hi-end pumps but isin't all the powerhead pumps's mouth 0.5"?

I see what you did there Greg. Clever ;)

Actually the problem is, the 0.5" pipe is pushing out too much water (bigger surface area) and hence my corals didn't like it (maxi mini was like WTH); I want to limit that.

I think your idea will help too. Correct me if I am wrong, but with your method, you are pulling in less water right?

Great. Will be waiting for your response :)

But class at this hour! Should NOT be fun I guess :|

what I did with mine is,

1/2" vinyl tube => 1/2" barb/female threaded fitting => male 1/2" / 1/4" slip in RO line.

or simply thread the inside of MJ outlet.

Can you please tell me the name of the stuffs that you used? I am really illiterate when it comes to plumbing stuffs :redface:

Same thing I did with mine, and those are pretty much the names you'll see at the HD (or wherever you go).

1/2" ID vinyl tubing ==> 1/2" barb to 1/2" FPT ==> 1/2 MPT to 1/4" quick-connect/push-connect/pressure fitting

http://i739.photobucket.com/albums/x...0-30222115.jpg

Awesome! Thank you so much. Will grab those two things from Canadian Tier :)

Only thing I'll add is, if you're looking for less pump output ...
Either, bypass the output back to the ATO tank with a T and a valve, or, buy a smaller pump

I've never used a JBJ unit, so sorry I can't help further

Thanks for the suggestion Greg :)

I don't think MJ1200 has too much flow, just wanted to narrow down the flow so that I don't get too much splash in the water. If I am not still satisfied, I will put a T-junction like you said :)

I must say, all great mind thinks alike.

So do as I did in the pic I posted and put a larger hose over the ATO feed hose

One thing I found when trying to cut back my MJ1200 is they get noisy. If you find that, do like Gregzz said and either run a bypass (basically a "T" with one going back into your sump) or get a smaller pump.