The Golden State: Where & How to Live, Secure, Visit, Enjoy and Thrive in California
New Handy Site On Plumbing
On pages 95 to 102, inclusive, is an article with illustrations Nos. 43, 44, 45 and 46, which give a description of the installation of up to date sanitary plumbing. Another article, on page 145, under the heading "Combination Vent and Drainage Connections," with illustrations on pages 146, 147 and 148, describes and shows the so-called F & W. combination fittings.
Continuous Venting
There is a system known as "continuous venting" which, it can be said, is free from the danger of stoppage; and, as known, the stoppage of a vent is more dangerous than that of a waste, as the stoppage of a waste makes itself known by backing up into the fixtures, while stopping-up of a vent is not known unless the vent is taken apart. It has been mentioned before,—in the article on traps,—that the accumulation of grease, etc., around the vent opening may close it up and cause siphonage in the trap. Mechanical devices have been tried to do away with this danger, but without success. Even the placing of a clean-out plug on the trap vent has been tried, but has not solved the trouble. The continuous vent seems to be the best solution.
There may be cases where it is hard to employ this method, but as a rule it can be done. Sometimes this is called "venting in rough," and from illustrations, sketches Xo. 11, 13, 14, 15 and 16, pages 196 to 201 inclusive, also on page 90, the principle can be seen. It consists mainly in using T-Y fittings in such a way that vent can be taken off at the top and waste from the bottom. For this style of installation only a half "S" trap can be used. The chances of closing the vent opening in this style are very much less than in the common style so often used. The opening is furthetfrom the trap; therefore more free from splashing of water as it enters the trap. Evaporation is less, and the use of T-Y fittings makes the accumulation of grease and other matters less liable. In this style of venting no parts, except the trap, need to be exposed.
The cost of installation of this system, both in materials and labor, is much less than for the other system, and the larger the work is the more is the percentage of savings.
For a line of a number of fixtures, as shown in Figure 14, this style is well adapted and is very much used, as it allows both the horizontal main waste and main vent to be run back of the partition. Vent is also taken off far from the trap, so the evaporation is less than in ordinary work and the danger of failure of trap, due to evaporation, is much less.
