Trojan Boat Forum

Getting ready to change my anti siphon valves. What is the best way to attack this? Do I need to remove the fuel line nut to be able to have the room to remove the valves? Do I need to use Teflon tape on the threads of the new valves. Any tips would be appreciated.

Line needs to come off as its on the anti siphon valve Teflon sealant in the male threads only

Thank you!