The Synergy Reef® 1.5" ReefMat 1200 Adapter allows you to connect standard 1.5" PVC plumbing directly to the inlet on the Red Sea ReefMat 1200. It will work on both sides, so using 2 you can have 2 x 1.5" drains connected to the ReefMat 1200. Designed for higher-flow installations, this adapter provides a clean, secure transition from 1.5" PVC pipe to the ReefMat 1200 connection. For best performance, we recommend plumbing 1.5" PVC directly into the ReefMat 1200 using this adapter. Includes: 1.5" PVC to Red Sea ReefMat 1200 adapter (Reefmat not included) Compatibility: Red Sea ReefMat 1200