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What is Difference Between Double Waste Valves # TR38, # TR38A, and # TR38B  

Question:

What is difference between TR38, TR38A and TR38B double valves?

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Expert Reply:

The difference between the part numbers you mentioned of # TR38, # TR38A and # TR38B comes down to the difference between spigots and hubs in terms of how these valves install. So hubs fit OVER a pipe and spigots fit INTO a pipe.

So the part # TR38A has a 3 inch spigot and a 1-1/2 inch hub
# TR38 has a hub for both fitting sizes
# TR38B has a 3 inch spigot and a 1-1/2 inch hub.

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Jameson C
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