hot water recirculation

Hi there. We replaced all the faucets and had the hot/cold water valves replaced in our bathroom last week. After turning the water back on, what used to take no time at all for the hot water to come in is now taking upwards of 2min before we feel hot water in the shower and faucets (this...

Hey all, Do you think I descale the entire hot water system - tankless heater and pipes - by running CLR solution or Vinegar through it using the circulatory pump? In this configuration the circulatory pump would suck CLR solution through all the pipes and the heater from a bucket on the...

I added 5 feet of 1/2 in. Type L copper pipe. I connected it to the existing hot water return line which has gate and check valves. The second picture shows the connection of the new pipe to existing gate valve with a SharkBite elbow. That run is 6 inches. The third picture shows the hot water...

By drilling a hole in the valve, see Need a low cracking pressure check valve, I was able to stop the chattering. Great. However, I am again seeing some black particles in the hot water, particles that come from the water heater and flow to the faucet via the recirculation system. I have two...

We just started the renovation of the master bath so before the demo I took out the sensor valve and installed it in other bathroom. While installing I think I did a mistake due to which there is no water in the bathroom sink now. I turned the hot water valve on first and didnt turn the cold...

I'm totally stumped here, hoping someone can help. When we moved into our 1954-construction home about ten years ago, we had a copper re-pipe done, and also a hot-water re-circulation system installed. It's been working great, until about six months ago, when I began to notice that the water...