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Differences Between Three Valterra Double RV Waste Valves

Question:

what is the difference between the TR38, TR38A, TR38B?

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Expert Reply:

The difference between the three valves are their fittings. The hubs on the valves slide over your RV's water lines while the spigots on the valves slide into the water lines.

Valve # TR38 has a 3" hub and 1-1/2" hub, both of which slide over your water lines. The 3" hub slides over your RV's black-water line while the 1-1/2" hub slides over your gray-water line.

Valve # TR38A has a 3" spigot and 1-1/2" hub, and the 3" spigot slides into your RV's black-water line while the 1-1/2" hub slides over your gray-water line.

Valve # TR38B has a 3" spigot and 1-1/2" spigot, both of which slide into your water lines. The 3" hub slides into your RV's black-water line while the 1-1/2" hub slides into your gray-water line.

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Kyle S

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