Howdy All;
Just my own experience, the connection for the water inlet on
mine
had no check-valve like the fresh water inlet. The only check-valve
was the one in the POC vacuum breaker/check-valve. After all, why
install a second ... wait a minute, ... it
IS Keystone we're talking about
isn't it ...
and mine was built on the Left Coast.
It's easy to check, pull the screen out of the inlet and look to see if there
is a shiny metal flat surface just behind where the screen was.
hankaye
__________________
Striving for a less complicated life since 1949 ...
Home: 2008 Cougar 278 RKS
T.V.: 2004 F-250 4X4, Level III BulletProofed , Detroit Tru-Track Differential (915A550)
Dog: 2006 Border Collie (Rascal) aka Maximum fur dispersal unit. (08/04/2006 - 12/16/2017) RIP.