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SPI 20A706-LY — 15-foot mercury float switch for reliable liquid level control in septic, sump, and wastewater pump systems. Heavy-duty construction for long service life.
SPI 60A808 — Tecmark TBS345 external air switch. Provides reliable on/off control via air pressure for aerobic septic treatment systems and spa/hot tub applications.
SPI 60A809 — Tecmark TBS454 internal air switch. Mounts inside the control panel for air-pressure-activated on/off control in aerobic septic treatment systems.
SPI 10A200 Observer 200 — indoor high water alarm with built-in battery backup. Provides audible and visual alerts for high water conditions in septic, sump, and lift station systems even during power outages.
SPI 10A516 Observer 500 — 120V indoor/outdoor high water alarm with audible horn and visual LED indicator. Alerts to high water conditions in septic, sump, and lift station systems.