This Merrill pressure switch is built for reliable performance in various plumbing and HVAC applications! The 20/40 pressure setting means it cuts out at 40 PSI and cuts back in at 20 PSI, which is pretty standard for many residential systems. The 1/4 inch pipe connection makes installation straightforward, and the captive nut on the cover ensures you don't lose small parts during maintenance. What's really important is the no-lead construction - it meets standards with no more than 0.25% weighted average lead content on wetted surfaces, making it safe for potable water systems. The adjustment is precise with each turn of the screw equaling about 2 PSI change, and the instructions are conveniently located inside the top cover. The contact points open on cut-out pressure (switch off position), which is the standard safety configuration. Measuring about 4x3.9x2.9 inches, it's compact enough for tight spaces but built tough with a combination of plastic and metal components. Whether you're replacing a failed switch in a well system, irrigation setup, or industrial application, this switch delivers consistent performance you can count on. The quality is what you'd expect from Merrill - reliable, durable, and designed to handle the demands of continuous operation. Definitely a solid choice for both professional plumbers and capable DIYers!
Free 30-day returns 
Free 30-day returns
