MIFABVerified
MIFAB MR-500-NPB Spec Sheet
Trap Seal Primer, No Lead
Product Overview
Access the MIFAB MR-500-NPB Pressure Activated Trap Seal Primer spec sheet, shop drawings, and submittal documents for seamless project integration. This ASSE Standard 1018 certified primer boasts a compact 4-1/8” height and features a replaceable stainless steel sediment filter for enduring performance. Engineered to activate with a minimal three PSI pressure drop, it ensures reliable water delivery to maintain trap seals, servicing up to six floor drains without requiring field adjustment.
Key Features
- Activates with only a 3 PSI line pressure drop for consistent trap seal maintenance.
- Field disassemblable design allows for easy cleaning and repair without losing precharge.
- Equipped with a replaceable stainless steel sediment filter to prevent debris interference.
- Four view ports permit easy visual inspection of water delivery and primer performance.
- Factory engineered to operate without field adjustments, simplifying installation.
Technical Specs
U.S. Patent6,152,164
Diameter (B)1-1/4”
CertificationsI.A.P.M.O., C.S.A., A.S.S.E. Standard 1018
Drains Serviced6
Filter MaterialStainless Steel
Inlet Connection1/2" Male N.P.T.
Wrench Flat Size1-1/8”
Outlet Connection1/2" Female N.P.T.
Cartridge MaterialPolyethylene (PE)
Overall Height (A)4-1/8”
Water Output Per Cycle1/2 ounce
Activation Pressure Drop3 p.s.i.
O-Ring Temperature Range-40 to 450 degrees F
Operating Pressure Range20 to 80 p.s.i.
About This Spec
Last Verified
April 16, 2026
Status
Verified (1x confirmed)