Dear Customer,
Yes, there is one inlet and one outlet in the Bitspower Tiny Tank SC6 200 Pump PWM. It does not have another connection. But you can add a T-Block for a drain valve. Such as BP-TBRGIG2. If you have any questions, feel free to contact us.
https://shop.bitspower.com/index.php?route=product/product&product_id=7280