Hot water recirculation for only one sink

I am in the process of building a new home. All my showers, sinks, etc. are close to the water heater except the kitchen. I want to recirculate hot water to the kitchen only. I'm using a Pex home run system and thought this might be a good plan to recirculate hot water to the kitchen only. The recirculation pump will be a Taco 006 Bronze pump. I thought the check valve on the cold side would keep hot water from entering the other cold outlets. I'm not certain if the check valve on the hot side is necessary.

Thanks.

You have an extra check valve on the outgoing hot toward the manifold.

I like to pull the water heater drain, and run the recirc there. However, you can also plumb it as the drawing shows.
If you pull the water heater drain, you add a tee for both a drain and the recirc.

You do NOT need the check valve in the cold system but DO need one between the pump and its connection to the tank. It is a minor point but your arrow shows the pump installed backwards. There are some benefits to connecting the circulation system to the bottom of the tank instead of into the cold water supply, but they are esoteric and do not affect the actual operation of the circulation system.

Thank you for the input. I'm not a plumber, but building in Mexico has made me be more of a plumber and electrician than I ever imagined. I must have the symbol for the pump backwards. The pressure side of the pump is to the cold inlet and the suction side of the pump draws from the kitchen return line. I removed the check valve on the hot line, but I don't need the check valve on the cold side? My water system is a pump and pressure tank that draws from a cistern. The pump controller is set at 40/60 psi. I can't find any documentation on how much pressure the recirc pump generates. I put the cold check valve in just in case the recirculation pump creates enough pressure to overcome the pressure tank when its drawing down and the pressure is near 40 psi.

Also, you say I need a check valve between the pump and it's connection to the tank. I'm assuming you mean the pressure side of the pump? What does that do?

I would normally connect at the bottom of the water heater, but I have solar water heating. It would be a bit too congested if I added the recirc. inlet there also.

Thanks again for the suggestions.

A pump creates a "closed circuit" so it CANNOT circulate outside the path you create, and thus CANNOT go into the cold water system. (And would NOT do anything anyway because the flow would be in the direction of the check valve.) The check valve on the "pressure" side of the pump prevents the cold water from flowing "Backwards" in the pipe to the sink, this getting NO hot water there.

hj said:

The check valve on the "pressure" side of the pump prevents the cold water from flowing "Backwards" in the pipe to the sink, this getting NO hot water there.

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Got it, that makes perfect sense now. Thanks