We use the EZ System due to having 2 Black and Grey Tanks. They have lengths available in 10ft and 5 ft. They also have a "Y" and depending on where the drain in the ground is located gives us the flexiblility of choosing different lengths. They also store easily with the holders I made.
We have gone with the Valterra system. It offers a lot of flexibility for us. We move often and don't know what we may find in the way of hookups. This system has a "y" connect and the ability to use any length hose on either outlet. It has rotating connections so you can make the hose lie flat without a lot of effort. There are interchangeable connections on all the pieces.
If you are running it to your house I would be inclined to use some sort of ridged pipe 3-4"in diameter such as ABS sewer pipe if you are planning on using it frequently.
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2008 Cardinal 30RKLE 5th wheel sold
2006 Rockwood 2607, 2001 Traillite
55 nights 2009, 53 for 2010
44 for 2011, 38 for 2012, 35 for 2013, 51 for 2014