[Myka]

I've rarely had luck finding gate valves or bulkheads at local plumbing supply companies. I have found Spears gate valves on occasion, but they cost double what LFS have them for. I'm not sure what the deal is. That's like RO filters - go to a water store of Home Depot and the filters cost at least double. The most local to you that I know of that has gate valves is Concept Aquatics in Calgary. Otherwise, our sponsors J&L Aquatics and Reef Supplies both carry gate valves.