Please help a newbie who doesn't know the jargon and can't find this particular problem addressed anywhere. We have an old (mid-'70's) fiberglass tub/shower with a separate diverter knob. Water leaks out of the back of the hot water knob (not out through the faucet) when the water is turned on, either hot or cold, either faucet or shower. What is causing this? Can I fix it? --The faucet brand (Eljer) is unfortunately not manufactured anymore, so replacement parts have to be universal. --The tub hasn't been used regularly for a long time because the diverter needed to be repaired. It functions reasonably well now, though there is some water that still comes out of the faucet when the shower is on. If a relatively simple repair doesn't work, we have to chose an option. 1) Live with it. (Is this likely to cause other damage?) 2) Rip out the other side of the wall behind it (which has a sink and vanity) to replace the whole faucet/shower system. 3) Tear out the whole 1-piece shower/tub and replace it all. (However, it is 1/2 inch short of standard 5' width. Is that within allowances for a new tub?) We honestly can't afford to spend much right now, so I'm hoping to repair or live with it, though getting rid of that avacado green monstrosity does sound good... Thanks for any help.