Flomatic 4242SS2 Stainless Steel Check Valve 1-1/4″ – Model 100MSS | Pump Professionals

Description

The Flomatic 4242SS2 is a 1-1/4″ stainless steel submersible check valve from Flomatic’s Model 100MSS series, designed to deliver dependable backflow prevention in well water and submersible pump systems. Built to perform in submerged, underground, and corrosive environments, this valve combines premium materials with a straightforward design that prioritizes long service life and installation ease.

As a 1-1/4 stainless steel check valve, the 4242SS2 is constructed to resist corrosion, mineral deposits, and chemical exposure commonly encountered in groundwater applications. The Flomatic 100MSS 1.25-inch platform is well regarded for its all-metal durability, and this model upholds that standard with robust stainless steel body construction rated for continuous submerged use. The submersible check valve MPT FPT connection configuration — male on one end, female on the other — provides flexible installation options and fits cleanly into standard well pump plumbing without requiring additional adapters or transition fittings. As a well pump check valve stainless model, it effectively prevents backflow and pump backspin when the pump cycles off, protecting both the pump and the piping system from pressure surge and wear over time.

The Flomatic 4242SS2 is an excellent choice for submersible well pump installations, deep well water systems, and groundwater extraction setups where corrosion resistance is a non-negotiable requirement. It also performs reliably in irrigation pump systems, pressure tank supply lines, and other below-grade fluid handling applications where stainless steel construction outperforms plastic or iron alternatives. Well drillers, pump contractors, and system designers will appreciate its straightforward threaded connections and proven Flomatic construction, making it a dependable long-term solution for residential and light commercial water well systems.