I am looking for the metric size for the Red sea reefer 250 return pipe. I want to create a manifold on my return but dont know which union metric size it is to convert to US. Any help would be appreciated.
https://www.bulkreefsupply.com/metric-to-standard-pvc-union-slip-x-slip-adaptive-reef.html
https://www.bulkreefsupply.com/metric-to-standard-pvc-union-slip-x-slip-adaptive-reef.html