ajohansson
Member
new house to me and have been working through some plumbing stuff with all of your help!
So put in my mixing valve this weekend. I have 2 water heaters. I assumed in series as the cold water inlet into one of them is hot all the time. The other water heater inlet is cold on the cold side which has the inlet shut off valve. The plumbing stubs out of the wall so its not like the hotwater heaters are jumped one to another on the exterior with all plumbing visible.
So heres the thing. I turn both water heaters to pilot, drain the hot water lines and put in the thermostatic mixing valve.
I turn on the second in series water heater to try out the mixing valve. I left the first one off because i had to repair some of the flue vent and didnt have any metal tape.
I go to the faucet check the temp and its 118 im happy as the water heater is at 140. Then my daughter comes down and says i have no hot water. Im puzzled and sure enough her bathroom sinks and shower has no hotwater. All other baths and sinks etc etc have hotwater in the house.
So i get the flue fixed and fired up the first water heater and she gets hot water and the inlet to the second heater is now warm.
So im thinking the first water heater goes into the wall and must T up to daughters bath which is directly above on the next floor and then stub out to the cold side of the second water heater.
Why would anyone do this? Is there an advantage? Now if i want to really protect all the fixtures i have to get another thermostatic mixing valve.
Any thoughts on why its plumbed this way would be helpfull.
AJ
So put in my mixing valve this weekend. I have 2 water heaters. I assumed in series as the cold water inlet into one of them is hot all the time. The other water heater inlet is cold on the cold side which has the inlet shut off valve. The plumbing stubs out of the wall so its not like the hotwater heaters are jumped one to another on the exterior with all plumbing visible.
So heres the thing. I turn both water heaters to pilot, drain the hot water lines and put in the thermostatic mixing valve.
I turn on the second in series water heater to try out the mixing valve. I left the first one off because i had to repair some of the flue vent and didnt have any metal tape.
I go to the faucet check the temp and its 118 im happy as the water heater is at 140. Then my daughter comes down and says i have no hot water. Im puzzled and sure enough her bathroom sinks and shower has no hotwater. All other baths and sinks etc etc have hotwater in the house.
So i get the flue fixed and fired up the first water heater and she gets hot water and the inlet to the second heater is now warm.
So im thinking the first water heater goes into the wall and must T up to daughters bath which is directly above on the next floor and then stub out to the cold side of the second water heater.
Why would anyone do this? Is there an advantage? Now if i want to really protect all the fixtures i have to get another thermostatic mixing valve.
Any thoughts on why its plumbed this way would be helpfull.
AJ