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Continue to ChatBurkert 783277 - DN20, G3/4, 8.6 Flow Rate KV, Brass, Heavy Design, Type TFU002 Check Valve For Water and Air https://www.process-valves.com/product/burkert-783277-dn20-g3-4-8-6-flow-rate-kv-brass-heavy-design-type-tfu002-check-valve-for-water-and-air/