Anybody know what type of set up this is?
http://i187.photobucket.com/albums/x296/dawlita/Robert011.jpg
Circulating pump.
W/H supply piping will be at the top of the tank.
This appears to be a supply to something behind the wall. Where does this supply piping go?
I agree with Brian…it’s likely a whole house hot water recirculating pump but I don’t know why there are two timer mechanisms…one feeding the other. Perhaps the one on the pump itself is defective and the homeowner simply ‘replaced’ it with the outlet mounted appliance timer. Usually no need to circulate hot water to the fixtures at 3:00 am you know.
One thing is certain.
If the original timer is still functioning it cannot be at the right time very often.:roll:
Probably stuck on as there are no pins.
Is this a system for instant hot water ?
The pump keeps the hot water moving through the system so you do not have to wait for it to travel from the Hot Water Tank.
So Yes.
Hmmm
No drip leg visible
For those of you who have not seen a passive re-circulator, here is one from yesterday.
David…here’s a diagram of a simple system. Google “hot water recirculation system” and you will get plenty of information.
The thing I have always had a hard time with is…
Why does the recirculation pump not push hot water back into the cold supply and only push it around the hot water supply pipes if there is no check valve on the cold water side.?
.
Bob the loop is formed from the hot side of the far fixture back to the cold inlet of the water heater.
Ok
But since it adds ore pressure to the tank you would think that it would add that pressure equally to the cold water inlet and the hot water outlet .
That is the concept that I have a hard time grasping.
If the cold water side had a check valve I could see the pump circulating the hot water supply only. (But it has 2 paths it could potentially follow as the tank has 2 openings). (Ok 3 counting the pump at the bottom drain).
How does a ‘passive’ one work?
tom
But Mike the pump is creating pressure in the tank as there is no imaginary pipe inside the tank as you drew in your diagram.
If the tank fills with lets say 5 pounds more pressure (ok do not know specs) then would not the 5 lb pressure be equally applied to both cold inlet an hot outlet as they both are openings at top.
Why would water choose to follow only the one path?
Cold **supply pressure **is **greater **than pressure created by pump, therefore preventing backing up into cold supply.
Well, first of all it has a little daisy and happy face painted on the side of it along with a peace symbol. It just very quietly does its thing and seems very meek and mild…probably made in CA, specifically S.F. and likely votes Democrat. :mrgreen:
Well, first of all it has a little daisy and happy face painted on the side of it along with a peace symbol. It just very quietly does its thing and seems very meek and mild…probably made in CA, specifically S.F. and likely votes Democrat. :mrgreen:
But… is it an Athesist?