I have a 1992 HiLo the Toilet water valve in the back of the toilet is leaking.I could not find a brand on my toilet or any paperwork on it in the Manuel. Are most of the valves standard. Mine has the pull to fill and flush handle on the side by the toilet seat. I found several valves on the amazon site. Thetford Water Module fits aqua magic V hi and low models. Any suggestions.