My 2015 27RLS is the same as yours. I've considered installing a PVC pipe from side to side (with hose connectors and caps), but have just used a section of FW hose pulled under the trailer. But, we travel with full FW tanks and I've always filled the FW at our camp site, not at a dump location.
Sherm & Terry w/rescues Steve (std Poodle) & Eydie (min Schnauzer)
2015 Jay Flight 27RLS (Camped: 102 nights 2015, 90 nights 2016)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.