My aquascape 1500 has died and we have a new aqua surge 2000. The connection on the 1500 is a 2″ discharge And the 2000 is a 1″ discharge. What part do I need to make the connection?

Since you have a 2″ check valve, you will need to purchase the adapter. Watch the DIY videos on how to install the AquaSurge. On the product page on the right side you will see the adapters of choice. The AquaSurge 2000 comes with the 1 to 1.5″ adapter but you do have to purchase the 1.5″ to 2′ adapter. Call 877 780-1174 if you have questions.