A trap primer (or trap seal primer) is a plumbing device or valve that adds water to traps. The trap primer mitigates this problem by injecting water, either directly or indirectly, into the trap to maintain the water seal indefinitely.Click to see full answer. Also question is, what is the function of a trap primer?Trap primers are used in plumbing systems to prevent floor drain traps from losing their water seal by evaporation. Maintaining the water seal will prevent the backflow of sewer gas into the buildings or rooms where the traps are installed.Also, where do you put trap primer? The Trap Primer must be installed on a cold fresh water line of 1 1/2” dia. or less. Must be installed near a fixture that creates a minimum of 10 PSIG pressure drop. Do not install on water heater line due to in- sufficient pressure drop. Do not subject Trap Primer Valve to pressure in excess of 125 psi. Also Know, are trap primers required by code? A trap primer is a device that causes a small amount of water to drain to the trap via piping from the trap primer. Plumbing codes require that trap primers be provided for “emergency” floor drains and other traps subject to evaporation. An example of an “emergency” floor drain is one in a toilet room.What is a trap seal?Trap Seals. Trap seals are a necessity in drains that are infrequently used, whether or not trap seal primers are installed. Trap seal primers can fail, but these trap seals can prevent dangerous sewer gases or insects and other pests from entering your building through your drain pipes.
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