1/2" Continuous Flow Trap Seal Primer

The MIFAB (P)MI-TSP-1-NPB Trap Seal Primer provides reliable, continuous water supply to maintain trap seals and prevent sewer gas emissions in floor drains and similar fixtures.

Engineered for dependable performance and corrosion resistance, this MIFAB continuous-flow trap seal primer ensures a steady delivery of water to floor drain traps during normal system operation. Constructed from durable materials with precision engineering, it helps maintain sanitary conditions in commercial, institutional, and residential plumbing systems.

• Model number (P)MI-TSP-1-NPB identifies this MIFAB Continuous Flow Trap Seal Primer from the MI-TSP Series.
• Designed for 1/2-inch sweat connection installations, providing consistent water delivery to one or more floor drain traps.
• Features a compact design with 2-3/4-inch length and 2-1/4-inch width for easy installation in tight plumbing spaces.
• Maintains trap water seals automatically whenever water flows through the supply line.

Technical Data & Specifications

• Manufacturer: MIFAB Inc.
• Series: MI-TSP
• Model Number: (P)MI-TSP-1-NPB
• Product Type: Continuous Flow Trap Seal Primer
• Function: Provides a controlled release of water to maintain floor drain trap seals
• Pipe Size: 1/2 inch
• Connection Type: 1/2 inch Sweat Connection
• Length: 2-3/4 inches (70 mm)
• Width: 2-1/4 inches (57 mm)
• Material: Nickel-plated brass body for corrosion resistance and long service life
• Operating Pressure Range: 20 to 80 psi
• Flow Activation: Continuous flow design; operates whenever supply water is active
• Discharge Line Size: 1/2 inch NPT or compatible tubing connection (as applicable)
• Application: Maintains water seal in traps for floor drains, restroom fixtures, and mechanical rooms
• Mounting Orientation: Horizontal or vertical (depending on installation requirements)
• Operating Temperature: 40°F to 180°F (4°C to 82°C)
• Compliance: Meets ASSE 1018 and CSA B125.3 standards for trap seal primers
• Finish: Nickel-plated for enhanced corrosion resistance
• Warranty: MIFAB Limited Warranty against material and manufacturing defects

Features & Benefits

• Continuous-flow design provides automatic, consistent priming action.
• Forged nickel-plated brass body ensures long-term corrosion protection and durability.
• Compact dimensions allow for installation in restricted plumbing spaces.
• Helps prevent sewer gas odors by maintaining water seals in floor drain traps.
• Lead-free construction complies with NSF/ANSI 372 for potable water applications.
• Certified to ASSE 1018 for continuous flow trap seal primers.