Aquascape Check Valve Assembly for AquaSurge Pumps | 29108 Connects pump to pond plumbing Helps prevent water from flowing back through the pump Specially-designed collar allows for easy disconnect For use with Signature Series 400/1000, Pondless Vault, and Micro Snorkel Vault filters, plus all AquaSurge pumps Durable construction ensures years of trouble-free use