both my explorers wer eplastic and so was my 150 5.4. Regular wrench will do ya fine, but only to loosen a bit. Use your hand as much as u can so as not to break. Same when putting back in; wrench only the last bit to snug it up, not tightn. They can't be hard to break.
On the 5.4 Triton I would use a little tube attached to the spigot male end, otherwise expect a mess.