Trap-Defender® Pressure Drop Automatic Trap Primer
Trap-Defender® is a pressure drop-activated automatic trap primer designed to be connected to any potable cold water line. It is automatically activated when a pressure drop as low as 3 PSI occurs. The control valve releases water into the floor drain’s P-trap to maintain a seal.
Automatic Trap Primers feature:
- Operates with 3 PSI pressure drop
- Operates at pressures from 20–80 PSI
- Fully automatic
- Lead-free brass with 1/2" NPT
- 1/2" NPT Union and 1/2" Sweat Union available
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Specifications
| Optional Materials | Nickel Plated -NP |
| Variations | Fig. 2694-UN 1/2"(13) NPT Union, Fig. 2694-SW 1/2"(13) Sweat Union, (2) 3/8” (10) Tappings -TAP |
| Compliance/Certifications | cUPC, ASSE 1018 Listed Seal No.143 |
| Patent | 9,708,808 & 10,190,306 |
Answers
The trap primer connection is to receive discharge from a trap primer valve (fig. 2694) to maintain the trap seal (water level) in p-trap below to prevent the emission of sewer gases.








