- Joined
- Oct 10, 2019
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- 53
- Reaction score
- 64
- What state or country do you live in
- Arizona
Hoping someone out there has some insight. I recently bought a complete apex system with a COR 20 and COR 15, new 57 UV sterilizer and I want to upgrade and hard plumb everything. I was told that the red sea main drain is 40mm and the return is 32mm. I recently purchased 1 and 1/4 inch pvc and want to switch everything to that. I used calipers and my readings came to an external dimension of 42mm and 32mm. I am not worried about the overflow drain yet, but for the return , how do I go from the 1/4 to the 32mm ? The adaptors I bought at Bulk reef are not for a 32mm outer diameter?

