Pennco Silver 1605HSID Cast-Iron Steam Boiler, 150,000 BTU, Natural Gas

The Pennco Silver 1605HSID is a 150,000 BTU natural gas steam boiler built around cast-iron sections and push nipples, for homeowners and heating contractors replacing a residential steam boiler.

Because the sections and the push nipples are the same material, they grow at the same rate when hot and keep a watertight joint without relying on gaskets. Steam builds in a 6 in. chest and leaves through two 2-1/2 in. NPT supply tappings into the distribution piping. An integral draft diverter guards against back drafts.

Standard safety equipment covers a low-water cut-off, a pressure limit control and a pop safety valve. The CycleGard CG400 low-water cut-off runs a periodic Intermittent Level Test: the burner pauses briefly, foam settles, and the control then reads the actual water level. Gas enters through a 1/2 in. NPT inlet, and the boiler runs on 120 V AC, 60 Hz, single phase, under 12 A on a recommended 15 A circuit.

Highlights

• 150,000 BTU input on natural gas

• Up to 82% efficiency

• Cast-iron sections joined by cast-iron push nipples

• CycleGard CG400 low-water cut-off with Intermittent Level Test

• 6 in. steam chest with two 2-1/2 in. NPT supply tappings

• Integral draft diverter, pressure limit control and pop safety valve

Specifications

Good to know

• Gas-fired appliance: it must be installed, vented and commissioned by a qualified installer in line with local codes and the manufacturer's installation manual.