Noisy standpipe

[scottybarker]

I have recently set up my first sump for my 100gal disp tank. My tank has an overflow wier of which I have in stalled a basic standpipe to drop the water to my sump in my cellar. I have tried several ideas to no prevail on silencing my standpipe. Any ideas

 

[coker98]

look up the durso standpipe on google or some other type of search engine

 

[scottybarker]

I have tried the durso approach but the only way I can regulate the water height onm the overflow section is to drill quite a large hole in the end cap which obviously increase the noise

 

[smleee]

Drill a small hole and put some flexible airline tubing into it reaching down far enough to the water level inside the durso. Glue it with some silicone and cut it off flush with the top of the durso. Fixed mine.

eee

 

[ambaratur]

Another question is how many GPH are you pushing with your return pump?

If it is more than 3-5x tank volume that can cause the overflow to me more noisy as well.

 

[scottybarker]

My turn around is aprox 3x display volume. I have tried inserting flexible ailine into a hole in the cap and this is the most stable so far. The water level in the overflow stays constant for about 20-30mins and then drops which is what is causing the gurgle. It then fills back to normal level (level with the top of the tee branch and the 90) a lot slower.

 

[MarkD40]

Sounds like your standpipe is siphoning. You need a larger air hole IME.

 

[rick s]

To cure my "water falling noise" I went very basic. Instead of having the water fall into a pipe and crashing into the water that is standing in it, I got rid of the pipes and connected a 3' flexible pool hose to my bulkhead. The flexible hose gently bends from vertical to horizontal. As it gently bends, the water gathers and gently slows down. No crashing, no gurgling, no noise.

My overflow is just a plain piece of pvc, open at the top, with a sponge on top of it to keep snails and junk out of my sump.

Be aware that the brand new hose gave me a lot of bubbles for a few days until the walls coated over. Now, there are none.

I also found that by making very slight changes in the bend angles, "angle of attack", and how it twisted and turned I could take it from relatively quite, to almost silent.

Just another option. . .

 

[Avi]

I found that the size of the hole on the top of the standpipe is critical in silencing them. I wound up using caps with 3/32nds of an inch on mine which completely silenced them. The slightest larger or smaller hole didn't work. I'd think that you may be successful, using a succession of drill bits on a cap and try from smallest then larger until one works for your setup.