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Drayton Sm1 Electro-Mechanical Timeswitch
Drayton’s SM1 single channel 24 hour electro-mechanical
timeswitch gives style and ease of use to suit most domestic
pumped and gravity heating systems.
• Suitable for combination boilers
• Advance feature
• 4 position slide for ease of setting
• Two on/off periods per day
• Standard Backplate
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