Durable Construction: Built with high-grade materials to withstand the thermal cycling and vibration found in high-efficiency heating systems

or error codes related to thermal sensors on your control panel

Always check your specific serial number for exact firmware matching

Built with corrosion-resistant materials and 1/8-inch fittings

Featuring a 1-1/4" MNPT inlet and a 1-1/2" FNPT side outlet

Metraflex DSEE0400 Pipe Fitting 322838-752 Durable Construction: Built with high-gradeThe Metraflex DSEE0400 is an industrial grade 4 inch Double Sphere Rubber Expansion Joint engineered to isolate vibration and accommodate significant thermal movement in hydronic and process piping systems. This flexible connector features a high grade EPDM body reinforced with nylon cord, making it suitable for water and glycol applications where corrosion resistance is vital. The dual sphere geometry provides superior flexibility and a lower spring