BRS Dosing Pump leaching!

[BBoley24]

Have you ever had a dosing pump leach into your water even if it's off?

My alk continues to drip into my tank from my BRS doser. I turned it off because I thought it was dosing too much... seems as if it is dosing itself! They are brand new.

 

[robbrouse]

How do you have the pump sitting, are they higher than the alk container? Could be a siphon effect.

 

[BBoley24]

They are higher than the bottles. What can I do about it?

 

[robbrouse]

Have you tried to blow out the lines and make sure there is no air in them.

Might be worth and call or an email to BRS.. They pump could be faulty and they might replace it.

 

[BBoley24]

 

[redfishbluefish]

Your two part containers are higher than the exit point of the dosing lines......you are getting siphoning! It's hard to tell from the picture if they will fit, but you need to lower your containers below the level of the exit point of the dosing lines.

 

[BBoley24]

So if I brought the drip lines above the bottom of the line in the bottle it would be ok?


I think I could manage that by letting them free fall into the sump...

 

[robbrouse]

Yes, that what I was trying to say. On my JBL ATO I had the same thing happening. I raised the pump and all was well.

 

[BBoley24]

So the line doesn't have to be above the bottle... just below the line on the bottom of the bottle?

 

[calreef18]

The line just has to terminate higher than where the feed tube is drawing from. So halfway up from the bottom of the canisters looks like plenty for you.

 

[Chameleon]

ummm a properly working peristaltic pump shouldn't allow siphoning because it should completely pinch the tube where the rotor contacts it. sound like yours is faulty or has the wrong OD/ID tube. I would contact BRS

 

[BBoley24]

That's what I thought too. Ill do both actions. Thanks guys!

 

[CoryC]

those only have two cams so, they dont entirely prevent a siphon. the drews dosers have four cams and will prevent a siphon. they mention this in the info on brs.com i'm fairly certain.

 

[calreef18]

Technically yes, but we've encountered several models of different peristaltic pumps over the years that just aren't good at preventing siphoning.

 

[BBoley24]

If I cut the tubes shorter it should stop the siphon. Pain in my **** to figure out a way to drop them from such a high distance but whatever.

 

[redfishbluefish]

It would appear that some are not clear on how and when siphoning will occur.


A siphon will occur when the level of the exit pipe is below the level of the liquid reservoir. It does not matter what the piping or plumbing does between these two points…..it could go up, down, around…again, what is critical is the level of the exit pipe to reservoir level.

 

[deboy69]

I would check the line to see if there is air in it. If there is then you have a pin hole that's draining the line not siphoning

KCCO

 

[CoralFragZ]

Are you using an Apex? If you are you need to use outlets 4 and 8 the others seem not to turn off the dosing pumps ontime every time.

 

[redfishbluefish]

Here is a potential solution keeping your ALK and CALC reservoirs in there current locations. Pick up some other tubing or piping…..I’m thinking CPVC. Get a couple U-clamps to attach these to the back wall of your sump. Put the top of this pipes higher than your ALK and CALC levels, with both exiting into your sump. Now run the tubing to the top of these pipes so that they drip/run into the pipe. Your “exit” height is now higher than the reservoir height and you will not get siphoning. Here is a crude drawing showing what I’m talking about.

 

[lnevo]

Here is a potential solution keeping your ALK and CALC reservoirs in there current locations. Pick up some other tubing or piping…..I’m thinking CPVC. Get a couple U-clamps to attach these to the back wall of your sump. Put the top of this pipes higher than your ALK and CALC levels, with both exiting into your sump. Now run the tubing to the top of these pipes so that they drip/run into the pipe. Your “exit†height is now higher than the reservoir height and you will not get siphoning. Here is a crude drawing showing what I’m talking about.

+1 i've seen lots of people do similar for ato pumps too.