Lateral Assembly

I just ordered a replacement Lateral Assembly for my Hayward S160T pool system. The bottom is different from the old one. The new one is open and the old one is solid, does anyone know if this matters?
Thank you
If that is the right one for your filter, it is good. The open design was to allow sand to get beneath the hub and support it better, at least that is what I was told. Less plastic was probably less expensive as well.
 
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If that is the right one for your filter, it is good. The open design was to allow sand to get beneath the hub and support it better, at least that is what I was told. Less plastic was probably less expensive as well.

If that is the right one for your filter, it is good. The open design was to allow sand to get beneath the hub and support it better, at least that is what I was told. Less plastic was probably less expensive as well.
Thank you, yes it had the right filter system listed for that. I got it from Pool Web.