Charles : Hello, and thanks for your question!!
Charles : it sounds like you have what we call cross over
Charles : this happens when you have a faucet valve that goes bad ant lets the hot and cold water mix in the pipes
Charles : it will normally happen with faucets that have a single handle
Charles : the cartridge valve lets the hot water get past the seals and force its wy into the cold pipes
Charles : it can also happen from a washing machine
Charles : washing mahines have a mixing valve inside that can go bad and cause the same problem
Charles : have you had any work done on the plumbing lately?
Charles : ok, i would start with the faucets closest to the water heater and turn off the water to that faucet, then run the water in the other faucets to see if it stops.
Charles : keep doing that until you find the culprit
Charles : if the cartridges are over 3 years old you should replce the anyway to keep this from happening
I have only one single handle faucet, the kitchen sink. Should that be the first place I start.
Charles : yes
Charles : all others are 2 handle? even the showers?
Where would all the rust be coming from
Charles : a very old water heater or old galvanized pipes
Charles : do you have galvanized pipes?
Charles : how plfd is the water heater?
Charles : sorry, how old
This just started tonight. Never had a rust problem. Do I have two problems or could the crossover caused the rust to begin
Charles : how old is the water heater?
Charles : it sounds like the water heater is bad
All others are two handle. Water heater is very old. Plastic lines ( water hose type lines).
All outside pipes are pvc
Charles : ok, t sounds like the water heater is bad. can you tell if the water seems hotter than normal?
Doesnt seem hotter. My water has always been very hot. If water heater is bad, would that also cause hot water to come out cold valves
Charles : it could if the hot water created enough of a presure difference between the hot and cold to cause the kitchen faucet valve to fail.
Charles : you should replace the water heater if its over 8 years old anyway because they only are really designed to last around 8-10 years before they go bad
Charles : does the water heater make noises whilte heating the water?
No noise. Just a sudden problem. Confusing. Are you recommending that I replace water heater first then check faucet. Or replace both
Charles : I would check both because the rust is from the water heater and the cross over is from the faucet.
Charles : if a small amount of rust got into the valve it could have caused that problem
Ok. Will see about getting it fixed tomorrow
Charles : I hope I was able to answer your question.
Charles : If so please remember to rate my assistance as positive so I get credit for assiting you.
Charles : d
Charles : Do you have any other questions in regard to your water heater ?
Not at this time. I will let you know tomorrow. If I rate you tonight will I be able to consult with you tomorrow
Charles : yes you can.
Charles : just reply back to the post tomorow and i will reply when i get the message
Charles : it may take a few hours to reply back to you depending on the time