[HayZee518]

the pump is connected to the riser at its upper end. the pipe is one continuous length of plastic pipe with a barbed end at the pump side and an angle discharge fitting where the line goes to your house. as you said there is a check or foot valve at the pump and that brass thingie is your other check valve. mounted horizontally it is called a swing check valve. because it is held closed by gravity and back water pressure it can leak somewhat. the swing cap is machined and its seat is also machined brass. your storage tank doesn't have an air bladder from what I'm reading so air can dissolve into your water thereby reducing the back pressure in your tank. so, given that I'd say check your tank pressure about twice a month. add air as you need it.