Modular Marine 2400 Overflow Chine In!

[WVReefJunkie]

What fittings did you use inside the overflow, and how did you tune it? Water Height, ect! I put two 2.5" standpipes for the primary and secondary, and a five inch piece for the emergency. I have a gate valve on the primary drain, but Iam getting a syphon sound from the secondary pipe.

 

[KStatefan]

Open the gate valve more