Hello, I bought a G220 tankless water heather, made by supreme tankless water heaters. I’m having a problem that I hope someone can help me with. I installed the unit where the hot water tank was, when I run the water now with your tankless water heater, the closest bathroom gets full hot water no problems, but when I run the water in kitchen or other bathroom, I only get cold. The closest bathroom is about 12 feet away and the other one is about 25 feet away and kitchen about another 10 to 15 feet further. I’ve when through all the frenquently asked questions and the troubleshooting in the manual, everything seems to be ok. One thing that might be a problem is that the water main coming in to the house is 3/4” copper tubing, wich I reduced to 1/2” to go into the unit and then back out the unit with 1/2” also, then it feeds the closest bathroom direct with 1/2” tubing and that bathroom has no problems but right after it goes to the closest bathroom it splits off to feed the other bathroom the tubing goes up to 3/4" tubing and then goes back to 3/4” copper tubing to feed the other bathroom and kitchen, reducing to 1/2” at those locations though. I don’t know if this would be a factor in not getting hot water in the other bathroom and kitchen, but the tubing coming out of unit doesn’t even heat up at full pressure. If I reduce the water pressure at the faucets, the water will get hot, but as soon as I open the pressure back to full, it gets cold again. It’s as if the unit can’t keep up with the flow of water, but it can in the other bathroom. Unfortunetly I cannot change the 3/4” copper tubing, because this is a single floor home with no basement and the 3/4” tubing runs under the concret foundation. It won’t even give me hot water at the kitchen sink alone on full pressure. If anyone would have any suggestions, I would appreciate it.