Recirculator for a hot water tank system.

stevieb

Would a hot water recirculation system or pump help reduce my costs if the hot water supply pipes to all areas were insulated.  We have faucets as far as 120 ft from our large capacity hot water heater. We have to run the water a long time to get hot water at those locations because of their distance from the tank. I realize there would be heat loss and thus the hot water heater may run more. Could the recirculator be put on a timer to run during business operation times only? We are a fairly large operation with 6 bathrooms, a commercial kitchen and 2 bars. It seems that a lot of water is wasted waiting for it to get hot. What are the trade-offs?

Gordy

Yes, yes, and yes

    Insulate the lines. Use a recirc to save water down the drain (minimal to pocket book in water dollars large to the environment in natural resource). 



   What is the water heater temp setting now?  If it is below 135* turn it up AND add anti scald protection at the water heater, or point of use. Point of use being a higher level of protection from legionella bacteria. This helps to keep legionella bacteria count low in the tank, and the pipes. It can also help extend hot water supply.



Gordy

 

bob eck

hot water recirculation

check out Grundfos comfort pump system. Pump with built in timer gets installed at the water heater on the supply side. If supply side is 3/4" the pump goes right in line. If supply is 1" the pump needs to be installed in a bypass piping and out under the faucet the furtherest away from the water heater there is a bypass valve installed connecting the hot and cold water lines. with this type system there is no need to run a return line back to the water heater. Inside the plastic bypass valve there is a device that when the water temp gets to the upper 90s*F it stops water from going into the cold water lines. you can install up to 5 comfort bypass valves to one pump.

www.grundfos.us/web/HomeUs.nsf/Webopslag/PAVA-56TMVA

Jack

Check out

www.gothotwater.com Excellent system

bill_105

Gotta ask??

Why is a domestic supply loop called recirculation? It's just circulating, What's the RE thing? Boiler water doesn't need any prefix. Lot's of mysteries out there

Mark Eatherton

Once its been circulated once...

then it becomes RE circulated, no?



Kind of like becoming REtired. What, you weren't tired enough to begin with when you were working full time, so now you quit and are REtired...



LOTS of strange words out there...



As it pertains to DHW recirculation lines, if installing them in a new situation, do yourself and the consumer a large favor and avoid having all three lines in the same joist bay, insulated or not. Run the cold in a completely separate bay than the hot and circ. return line. Because, what ever resources you may have saved by installing the return line will be lost flushing hot water down the drain due to thermal trans migration within the joist bay.



ME