What size durso standpipe?

[AChilton]

The diameter of the tube (which i'm pretty sure is my standpipe) in that picture is 1 1/4 inches. i don't know what type of durso standpipe i need for that. plus i'm not sure if it's a slip or threaded? can anyone help me out?

 

[Brian]

I can be 100% sure, but I don't THINK you can put a Durso in a a HOB overflow. Are you just looking to cut down on noise? When I had HOB's I would get a piece of acrylic and cut it to size and use it as a cover...worked well for that.

 

[AChilton]

Yeah just the noise between the gurgling and the splashing it sounds like niagra falls and it's driving me crazy (it's in my bedroom) i've tried everything except this

 

[Nickjr000]

Put some egg crate over it with a filter pad. Just check the pad often cause if it clogs you might overflow

 

[redfishbluefish]

We used a homemade durso in our HOB overflow. Without it, it sounded like a toilet flushing. Just use a pipe that loosely fits in the drain hole. Here's two pics:

 

[AChilton]

And what is the placement inside the overflow? that looks great i'll have to try it