You linked to the Valterra EZ Valve Electric Waste Valve for RV Black Water Tank, # E40-8 a 3" Hub to 3" Spigot.
The difference between a hub connection and a spigot connection is that the hub is the female end and has a lip on the inside that stops the spigot (or male) end. Please note the three options of a 3" Hub to 3" Hub - # E40B-8, 3" Hub to 3" Spigot - # E40-8 or 3" Spigot to 3" Spigot - # E40A-8.
I suggest you remove the current component and examine what you have.
For installation,... view full answer...
The difference is that the Thule HideAway Roll Out Awning # TH490011 is a direct mount which you install with the included hardware while the Thule HideAway Roll Out Awning # TH490010 is a roof rack mount and it requires a roof rack for the installation.
Other than that they are the exact same awning. view full answer...
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