The 74 shut off valve offers unmatched durability and flow in a light weight package. Made from reinforced, fiber filled plastic, the 74 Shut Off Valve is designed for longevity. Boasting a larger opening than our popular 300 Brass Shut Off Valve, the 74 allows a full flow of water. We trust these everyday in the garden center and greenhouse, so should you!rden center and greenhouse, so should you!