"Slow" plumbing in an old house
I have just finished the annual descaling of my Noritz tankless water heater and am just wondering . . .because the distance from the heater to the kitchen is almost 40 feet and the old house (circa 1964) has 1/2 inch copper pipe for the entire distance, would it be advisable to descale the copper pipes?
I use white vinegar and a recirculating pump through the water heat exchanger and could do the same with plumbing in the house if it would help water delivery and NOT HURT anything.
Other facts: from the heater to the two bathrooms the distance is less than 10 feet and the water delivery is fine. Still 1/2 inch copper pipe. On the kitchen end of the house is the utility room with washer/dryer. We have poor pressure and delivery in all fixtures in that end of the house. The pressure has gotten consistently lower for the past ten or so years.
So what does anyone out there think?
I will appreciate any input.
Lee - TexasGeezer