Hello. Looking for advise on this issue.
When I first moved to this house 10 years ago, I installed a recirculating pump on the hot tank, with a valve at the furthers sink. I remember the plumber saying that I would get some initial hot water in the cold line, when using a sink. And I did. The plumber did not install a check valve.
Fast forward to 2021. A Navien NPE210A was installed (see attached picture) with the NaviCirc valve installed at the furthers sink since there is no dedicated return line. The cold line comes into the unit from the left side. The sequence is a follows: check valve, T to return inlet, small expansion tank, check valve, cold water inlet.
Unfortunately, there is still warm water in the cold line. NPE210A indicates that the IN water-temperature is in the 80s. The cold line out of the wall feels warm when the recirculating pump is running. Warm water is coming out on the cold side at the sinks when the pump is running. There is an outside bibb that is particularly warm. It is in the middle of the house, closest to the middle bathroom.
The two bathrooms and kitchen have been remodeled since I moved in. This includes new water fixtures and valves all around. There are two one-handle showers and one one-handle kitchen fixture, with a sprayer. They are all between five and 10 years old.
Your comments and advice will be greatly appreciated.
When I first moved to this house 10 years ago, I installed a recirculating pump on the hot tank, with a valve at the furthers sink. I remember the plumber saying that I would get some initial hot water in the cold line, when using a sink. And I did. The plumber did not install a check valve.
Fast forward to 2021. A Navien NPE210A was installed (see attached picture) with the NaviCirc valve installed at the furthers sink since there is no dedicated return line. The cold line comes into the unit from the left side. The sequence is a follows: check valve, T to return inlet, small expansion tank, check valve, cold water inlet.
Unfortunately, there is still warm water in the cold line. NPE210A indicates that the IN water-temperature is in the 80s. The cold line out of the wall feels warm when the recirculating pump is running. Warm water is coming out on the cold side at the sinks when the pump is running. There is an outside bibb that is particularly warm. It is in the middle of the house, closest to the middle bathroom.
The two bathrooms and kitchen have been remodeled since I moved in. This includes new water fixtures and valves all around. There are two one-handle showers and one one-handle kitchen fixture, with a sprayer. They are all between five and 10 years old.
Your comments and advice will be greatly appreciated.