Replacement valve readily avaliable from RV stores, online, even Amazon. Valve is abouit $40 - $45.
Domentic has video and instructions on line showing replacement of valve. Also, you can find videos on YouTube.
You need valve and small hose clamp. Should be 5 minute job.
PM me if you need more info.
"I went to the woods because I wished to live deliberately...and not, when I came to die, to discover that I had not lived." H. D. Thoreau
2012 Nissan Frontier 4X4 Crew Cab Longbed
2014 Flagstaff 21FBRS