Multi-port Valve

[etm1109]

My multi-port valve is shot. I found a replacement at a pool supply company. The sales rep told me to buy a rubber gasket. Along with all of this he provided me some silicon glue. Told me to remove the old valve. Let it dry and then apply the glue.

Is there anything else one should know about this process that is not too obvious asides from the fact I haven't used glue like this since I built reall y bad model airplanes in the early 70s