 The center jet is the PEM 749. |
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PEM 740 Series Aerating Jets represent one of the most widely used spray effects in the world. This type of jet evolved over a period of time as to be one of the most effective and flexible, yet least flow demanding "White Water" spray effect jet.
PEM 740 Series Aerating Jets are extremely economical to use as they provide with a least possible flow of water, the maximum in visibility of spray effects. They are the "White Water' Jets. The jets are submerged to their immersion level. Built in swivel bases permit directional adjustment to appr. 150° off center line. Micrometric adjustment of the air intake sleeve permits changing the ratio of water drawn from the pool and air, thereby changing the appearance of the spray and its height.
Adjustment rules:
- 1. Air Intake Sleeve UP, spray heavier and lower.
- 2. Air Intake Sleeve DOWN, spray lighter and higher.
PEM 740B Series Aerating Jets are offered with suction strainer around the intake ports of the jet to prevent leaves or debris from plugging up these ports, causing the jet orifice to spray unimpeded to the height of the operating head pressure. PEM 740-A Series Jets are offered without the suction strainers for locations where they are not required or desired. These aerating jets require a constant water level with a differential not exceeding 20mm\0.750" plus or minus.
| No Strainer | 742A | 743A | 744A | 745A | 746A | 747A | 748A | 749A |
| 507-4010 | 507-4020 | 507-4030 | 507-4040 | 507-4050 | 507-4060 | 507-4070 | 507-4080 | |
| With Strainer | 742B | 743B | 744B | 745B | 746B | 747B | 748B | 749B |
| 507-4110 | 507-4120 | 507-4130 | 507-4140 | 507-4150 | 507-4160 | 507-4170 | 507-4180 | |
| Pipe Size (in.) | 3/4 | 3/4 | 1 | 1-1/4 | 1-1/2 | 2 | 2-1/2 | 3 |
| Stream Size (in.) | 0.750 | 1 | 1.250 | 1.5 | 2 | 2.5 | 3 | 3.5 |
| Nozzle Orifice (in.) | 0.625 | 0.750 | 1 | 1.25 | 1.5 | 2.0 | 2.5 | 3 |
| Suction Strainer | 0.125 | 0.187 | 0.2 | 0.250 | 0.325 | 0.50 | 0.50 | 0.625 |
| Overall Height (In.) | 7.5 | 77.50 | 9.5 | 10.5 | 13.5 | 15.5 | 17.920 | 21.5 |
| Submersion Point (in.) | 6.3 | 6.4 | 7.875 | 8.9 | 11.5 | 13.5 | 13.98 | 19.185 |
| Overall Height (Strainer) (In.) | 5 | 5.75 | 6.5 | 8 | 8.75 | 10.5 | 10.5 | 13 |
| Overall Diameter (Strainer) (in.) | 3.5 | 3.5 | 3.5 | 4.5 | 5.5 | 7.5 | 7.5 | 9 |