I have 4 1.5 inch drains in my box. 2 are full siphons with nothing in them and 2 have standpipes.
A standpipe is not noisy unless you have a lot of water going down in which case you need to open the main drain valve more until it isnt.
I think the U thing was designed for single drain tanks as a way to overcome noise.
I dont and have never needed to use it because I avoid having single drains.
A standpipe is not noisy unless you have a lot of water going down in which case you need to open the main drain valve more until it isnt.
I think the U thing was designed for single drain tanks as a way to overcome noise.
I dont and have never needed to use it because I avoid having single drains.