By swapping out the TEV orifice with this genuine Sporlan 168082

The 169X4 brass elbow facilitates optimal gas flow dynamics with minimal turbulence

or blocked secondary heat exchangers

Featuring an auto-reset 265-290F limit

It is designed to automatically re-engage the circuit once the internal temperature falls roughly 20°F below the trip point

Utica-Dunkirk 1260006SP Gauge By swapping out the TEVThe Utica Dunkirk 1260006SP is a heavy duty boiler temperature pressure gauge designed for precise monitoring of hydronic heating systems. This dual reading instrument features a temperature range of 70F to 320F and a pressure scale of 0 75 PSI, providing critical diagnostics for residential and commercial cast iron boilers. Built with a 2 inch shank and a standard 1 4" NPT bottom connection, it ensures a secure, leak free installation on the manifold