Harwil Q12DS-3-3-4S-1 Flow Switch 1 3/8" long for 3/4 plumbing

Reliable inline flow switch designed for 3/4 inch plumbing and for use with pool and spa equipment. This compact flow sensor is suited for pumps, heaters, filters and automation systems that require positive flow detection.

• Vendor Harwil
• SKU Q12DS-3-3-4S-1
• Probe length 1 3/8 inch
• Plumbing size 3/4 inch inline connection
• Typical applications Pool equipment spa systems pumps and heaters

Key features

• Compact inline design for straightforward installation and retrofit
• Durable construction for reliable long term service in wet environments
• Provides positive mechanical switching to protect pumps and heaters from no flow conditions

Installation and maintenance

• Install in the correct flow direction and secure per system requirements
• Verify electrical ratings and wiring before connecting to your control system
• Inspect regularly for debris and clean as part of preventive maintenance

Compatibility and fit Designed to work with standard 3/4 inch plumbing lines and common pool and spa control equipment. Confirm physical dimensions and switch type with your equipment vendor or the product datasheet to ensure correct fit.

Support If you need help confirming compatibility or installation guidance contact our support team or consult the vendor datasheet for full technical specifications.