Trying to quiet overflow - Can I raise standpipes?

[Reflective]

I have durso standpipes in my overflow that were provided to me by the manufacturer of my tank. The tank is SUPER loud. I feel like 90% of the noise I hear is from the water falling into the overflow box before it goes into the pipes... it's probably a 6-7" drop. Is there a reason the pipes are that low? Can I raise them to be around a 1-2" drop without any problems?

 

[HiddenUser]

No reason you couldn't raise them (unless they're glued into the bulkheads and what not). Still wouldn't be an issue, just going to be more work.

Also check into putting a gate valve on one of the return lines. This would help control the water level in the tank / overflow as well.

 

[Reflective]

Awesome. I don't think they are glued into the bulkheads so I'll just add more pipe.

 

[Jimbo662]

If you have two drain lines you can look at doing a herbie set up. They're dead silent. Make sure your drain line into the sump is about 1" under the running water level to prevent any noise down there too.

 

[HiddenUser]

Awesome. I don't think they are glued into the bulkheads so I'll just add more pipe.

Perfect - Just make sure to either take the water out of the overflow box or to have enough room in your sump before you pull the pipe from the bulkhead as it will drain the contents of the overflow box entirely.

 

[Engloid]

I wouldn't recommend any valve in your drain line. Using a valve in the drain to control flow back to the sump is a bad idea. As any debris builds up on the inside of it, flow slows down and the pump flow up to the tank doesn't change. In other words, you can easily, over time, have a situation where water is going into the tank faster than it is draining out.

 

[Pete polyp]

I wouldn't recommend any valve in your drain line. Using a valve in the drain to control flow back to the sump is a bad idea. As any debris builds up on the inside of it, flow slows down and the pump flow up to the tank doesn't change. In other words, you can easily, over time, have a situation where water is going into the tank faster than it is draining out.

Having a valve on one of the drains is how a herbie works. If the drain with the valve gets clogged then the emergency drain takes over.

 

[AZDesertRat]

Go to the landscape sprinkler dept. at Lowes or Home Depot and buy a couple PVC repair couplings or commonly called "telescopes" in the landscape business. These will let you slide your Durso intake up or down to get the best level in the overflow box.
http://www.homedepot.com/p/Mueller-...ion-Slide-Repair-Coupling-160-505HC/100175547

I do not like the idea of valves in the overflow line unless you have at least one completely unrestricted standpipe capable of taking the entire flow of your return pump. I have run a single 1" Stockman standpipe unrestricted for 13 years with zero issues and use a Water Blaster HY-5000 pump fully open presently so lots of flow.

 

[Engloid]

Having a valve on one of the drains is how a herbie works. If the drain with the valve gets clogged then the emergency drain takes over.

I'm not familiar with these nicknames, but as long as there is a backup, it should be fine as far as safety goes. That said, it kinda seems like extra fittings and work.