A. Yes. Always use water that is as clear and free from foreign matter as can be procured, rain water preferred.
Q. What is the result of using impure water?
A. It will form a scale upon the flues and plates on the inside of boiler.
Q. What harm does scale do?
A. In the first place scale is a non-conductor and prevents the heat of furnace from producing its best effects upon the water and in the second place it allows the plates and flues to become over heated and burn.
Q. How can you prevent the formation of scale?
A. There are numerous compounds upon the market some of which are known to be very reliable, but for ordinary purposes sal soda dissolved in the feed water answers very well.
Q. What precaution should be taken in the use of sal soda?
A. Great care should be taken that too much is not used at a time. If too much is used a great deal of trouble will be caused by the water in the boiler foaming.