How to silence a Maggie mini.

[degibson84]

Just got a Maggie mini installed. It took away the flushing sound but occasionally i notice it stops the overflow from draining. Then it will drain fast and I get a whistle from the Maggie's muffler. And the water in the sump gurgles like mad.


Is there anything I can do to modify the muffler to stop the whistle and gurgle

 

[moondoggy4]

Can you slow down the pump I have done that on mine and it seems to work.

 

[degibson84]

There is no valve on the return line.


The pump is only 692gph before headloss. I couldnt imagine it being to strong after head loss

 

[degibson84]

The whistling is probably more annoying than the flushing sound I had before this damn muffler.

 

[moondoggy4]

Try turning off the pump and then turning it back on. I just turned my pump all the way up and no whistling or flushing.

 

[azjohnny]

Whats the diameter of the drain pipe?

I have a Maggie Muffler on a 1.5" drain and I had to valve back the pump to about 800 gph after headloss

 

[degibson84]

It's a 1 inch drain.


And my pump is only 692 before head loss

 

[azjohnny]

It's a 1 inch drain.


And my pump is only 692 before head loss

Sounds like you are past your limit with a 1" drain that is not a full siphon. Install a ball valve at the pump and back off on the flow until the noise goes away

 

[degibson84]

Really? After 4 feet of head loss I would think a one inch drain could handle that

 

[Yogre]

It's been said in the DIY forum that the flow limit for an open channel drain like a Maggie or a Durso is really pretty low without whistling or gurgling.

It does sound like you've found the limit for your 1" Maggie. Any chance you could fit the 1.5" Maggie in your overflow, maybe use a 1" to 1.5" adapter at the bulkhead for the standpipe?

 

[degibson84]

Overflow box is really tight with the 1 inch.


I have read that drilling out the hole on the top slightly larger and adding airline down it would stop the whistle.


But I could always grab a ball valve and a few plastic hose clamps and throttle it back. Before I start drilling

 

[Yogre]

Yeah I'd try throttling the return a bit first. If that doesn't work the airline with a little airline valve to regulate the air into the muffler might be worth a try.