# Option 3 {% hint style="warning" %} You only need the bottom portion of the RM500 when connecting the plumbing. Remove the top roller part first! This will give you plenty of room to connect it to the sump or tank drain. {% endhint %} 1. Leave the 1" bulkhead in the sump. 2. Cut an approx. 20" piece of the black RS tube. 3. Connect the RM500 to the screw fitting on the black tube. 4. Slide a piece of 1" PVC into the other end of the black tube. 5. Connect the 1" PVC to the bottom of the bulkhead. 6. NO Glue is required. Just slip fit. The Black tube will be in a semi S shape and be pointed towards the front of the sump. 7. Plumb your aquarium drain to the 1" bulkhead. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.synergyreef.com/installation-manuals/rm-sump-installation/rm34-sump-setup/installing-a-redsea-reefmat-500/option-3.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.