Other Products This silicon phosphate filter reduces lime buildup in tankless water heater systems. Interior lockable disconnect for water heaters and boilers. Exterior emergency disconnect for water heaters and boilers. Alarm lights alert that the water heater or heaters are not working. Carbon Monoxide Monitor System for boiler rooms with power interrupt This allows cleaning under your water heater and for service. 888-444-4435 Let’s work together. Get in touch!