This trap contained 13 1/2 ounces of water and a seal of 2 1/4 inches. After 5 seconds' test, 6 ounces of water remained in the trap, which had a seal of 1 inch. The trap was again filled and tested for 25 seconds without further reducing the water in the trap. The trap was again filled and a further test of 5 seconds applied without materially lowering the water in the trap. The Cudell trap used for this test was not the ball trap previously shown, but a newer design, a sectional view of which is shown in Fig. 167.

Test of Hajoca Trap = This trap contained 35 1/2 ounces of water and a seal of 7 1/2 inches. After 5 seconds' test it was found that a seal of 2 3/4 inches remained, the water weighing 7 1/2 ounces.

Without refilling the trap, a further test of 5 seconds was made, which showed the siphonic action still continued. The test of this trap was then discontinued until the following day. The second trial of the Hajoca trap on the following day lasted 25 seconds. After the test there remained in the trap a seal of 1 1/2 inches, the water of which weighed 6 3/4 ounces.

Fig. 167

Test Of The Centrifugal Trap

This trap contained 29 1/2 ounces of water and a seal of 3 3/4 inches. After a test of 5 seconds there remained in the trap about 10 1/4 ounces of water which maintained a seal of 1 inch. After a 25-seconds' test the water was slightly lowered, leaving a seal of less than 1 inch and a weight of less than 10 ounces.