How far can you run hot water lines?
Is it reasonable to run hot water 70 ft for a washer and basin and can I get by with 3/8″ copper tubing?
Here are the details.
A friend of mine bought a house with an addition(s).
The orginal house has a basement. It is on a hillside. On the side there was what was rummored to have been a garage. However, the drive would have had to rise 8 ft in 40 to get into it.
Anyway you can look at it from the newest addtion and see that it has joist about 4″ over a concrete slab. So all the wiring and plumbing must have been done before the sub-floor was put in.
In this addition is a powder room with a washer and dryer.
In front of this is a 2 story addition with a garage in the lower level. In the garage is a furnace, hot water heater and sub-pannel. The cold water, gas, and sub-pannel feed all run from the old basement into the in accessible part of the addtion and then into the garage.
When she moved in the hot water heater in the garage was not working and it was said to have “exploded”. I think that just the safety went off, but I have no idea what happend. Anyway the hot water heater has been removed and there is currently no hot water for the basin or washer.
The plubmer was out doing some other work and I wanted him to run a line from the hot water heater in the old basement. But we looked at it and thought that it was easiest to just replace the one in the garage.
But I had and electrican out to look at upgrading the serive and runing a new feeder to the sub-pannel (way undersized). That is also unaccessable, but he said that he could punch a new hole through the foundation between the old and new sections and fish it the 5-6 ft needed to get into the garage addtion.
I was wonder if I could do the same thing with copper tubing and if so could I get by with 3/8″ to reduce the time for the hot water to get there. The run will be about 50 ft from the old water heater to where the new one was in garage. And then another 20 ft to the washer and basin. Water usage will be mimimal. Most clothes washing is with warm and even cold water.
I prefer not to replace the WH for two reasons. First it will be used very little so the energy efficency will be poor. Secondly I am not sure about the venting and the gas lines. That can be fixed, but there are many problem areas in this house and I think that the efforts can be better spent fixing other things.