dump valve

Dear YD I cannot unscrew said dump valve from a DUI suit to replace it. Are there any tricks or tools that I should be using to save damaging my hands any further? I cannot get it to shift at all. I see from DUI forums that they recommend a bead of silicone sealant when replacing these dumps and...

This week, i need to replace my Apeks Low Profile dump valve. What adhesive if any should i be using in when replacing it? (If any) When i took my old valve off today, it clearly had been installed with some form of silicone or glue, but was suggested to me today, i dont need anything at all ...