The Golden State: Where & How to Live, Secure, Visit, Enjoy and Thrive in California

New Handy Site On Plumbing

Q. 36. What is air-lock?
A. 36. Air between trapped pipes preventing circulation:

Q. 37. Why should traps in both hot and cold water pipes be avoided?
A. 37. Because better circulation of the water will result.

Q. 38. Can range boilers be syphoned?
A. 38. Yes, if the tube of cold water supply has no vent opening.

Q. 39. How should large hot water tanks be suspended from cellar timbers?
A. 39. With good bolts and bands of iron.

Q. 40. What is the best method of avoiding airlock at high point of piping when boiler is heated by water front above it?
A. 40. By taking off supply to fixture on highest point of hot water pipe.

Q. 41. Give your idea of theory of ventilation, as practiced in plumbing work.
A. 41. Have stacks large enough to allow fresh air free circulation and revent properly to prevent syphoning of fixture traps.

Q. 42. Tell the difference between weight and pressure in a pipe 60 feet high, full of water.
A. 42. Thirty pounds.

Q. 43. Can a pipe be filled with water through tight connection, both ends being closed with a pressure of 60 pounds?
A. 43. No.

Q. 44. Are all gases lighter than air.
A. 44. No.

Q. 45. Give name of some gas that is heavier than air.
A. 45. Carbonic dioxide.

Q. 46. Explain the heating of water in a boiler and causes for circulation.
A. 46. Water being heated expands causing it to become lighter than cold water which causes circulation.

Q. 47. Explain syphonic action, how caused and the effect produced and how it can be avoided.
A. 47. Water rushing in a pipe causes a vacuum. The air pressure forcing the water in the vacuum causes a syphon, which can be prevented by venting the inlet of air, breaking the vacuum.

Q 48. What is water composed of?
A. 48. "H2O"—2 parts hydrogen, 1 part oxygen.