Sioux Chief ETP series electronic trap primers shall be used where replenishment of floor drain traps is required. Trap Primers shall be listed and Certified to ASSE 1044 and equipped with solenoid actuating device, vacuum breaker, distribution manifold, and proper electrical hardware. ETP series trap primers water release is factory-set for daily operation of 2 ounces of water. ETP series trap primers allow for various water distribution by adjusting the frequency and duration of the priming operation. Electronic Trap primers are equipped with an ASSE 1010 arrester to protect the solenoid device. ETP trap primers generally have a 1/2 f. sweat inlet and 5/8 compression outlets ports. ETP trap primers are available in various port totals up to 30 ports. ETP recessed and surface-mount primers are loaded into a metal box which is either 14 x 14 or 14 x 30.