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A great way to save money is to install a heat exchanger on the drain of your shower. By warming your cold water feeding the hot water tank or instantaneous unit you can reduce the amount of energy to replenish the heater.
My website: https://www.plumboogle.com
How to make a heat exchanger, first video : https://www.youtube.com/watch?v=ZKrPT0_vSug
How to prepare and solder copper: https://www.youtube.com/watch?v=S3s0Cuv4Lng
See how a plate exchanger works:
https://www.youtube.com/watch?v=Iv8AdPY3X3s&feature=c4-overview&playnext=1&list=TL-UTgf1LMIUs
Post time: Aug-20-2017