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Pressure Switch Tecmark 4010P adjustable for spa heaters 1/8′ NPT Thread 22 amp rating, non-latching, momentary, snap action. Tecmark Series 4000. SPST, diameter 1.92′ installed height is approximately 2.6′ and requires 2-3/4′ clearance diameter to install. Tecmark p/n’s 4037P, 4010P, a very good universal hot tub pressure switch replacement for Barksdale, Len Gordon, Herga, and others. Replaces: Tecmark Series 3000. Replaces older Tr-Delta pressure switches 3029, 3029P, 4000 Series Pressure Switch 4010P 25A SPNO 1/8′ Thd Plastic
