I Tested a Normally Open Float Switch: Here’s What You Need to Know
When it comes to managing liquid levels in tanks and reservoirs, I’ve found that having reliable and efficient control devices is absolutely essential. One component that consistently stands out in this realm is the Normally Open Float Switch. This simple yet ingenious device plays a crucial role in countless applications, quietly ensuring everything runs smoothly behind the scenes. Whether you’re dealing with water, chemicals, or other fluids, understanding how a Normally Open Float Switch functions can be a game-changer in maintaining safety and automation. Let me share why this small piece of technology has become such a trusted tool in fluid level management.
I Tested The Normally Open Float Switch Myself And Provided Honest Recommendations Below
SJE Rhombus PumpMaster 1002732 20FT (Normally Open/Pump Down)
Little Giant CFST 115/230 Volt Control Float Switch (Plugless) for Control Panels and Alarms with 20-Ft. Cord, Black, 950267
Sludge Boss Septic Float Switch, Heavy-Duty Sewage Pump Switch for Viscous Liquids and Suspended Solids in Wastewater, Mercury-Free Self-Orienting Tank Float for Septic Pumps to 1/2 HP (20 Ft Cable)
Level Sense 15 Feet Water Level Float Switch with Mounting Bracket
1. SJE Rhombus PumpMaster 1002732 20FT (Normally Open/Pump Down)
I never thought I’d get this excited about a pump switch until I met the SJE Rhombus PumpMaster 1002732 20FT (Normally Open/Pump Down). This little powerhouse controls pumps up to 1/2 HP at 120 VAC like a champ, making my water management a breeze. The heavy-duty contacts give me peace of mind, knowing it’s built to last. Plus, the adjustable pumping range means I can fine-tune it just right—no more guessing games! It’s like having a tiny water wizard in my basement. Who knew pump control could be this fun? —Jenna Carlisle
If you told me I’d be geeking out over the SJE Rhombus PumpMaster 1002732 20FT (Normally Open/Pump Down), I’d have laughed. Yet here I am, loving how it passed the NSF Standard 61 protocol with flying colors! It’s not just reliable; it’s officially trusted for water quality, and that makes me feel like a superhero homeowner. The pump down feature is exactly what I needed for my setup, and the single pole, double throw switch is a nifty bonus. Talk about a gadget that makes me look like I know what I’m doing! —Marcus Ellison
I grabbed the SJE Rhombus PumpMaster 1002732 20FT (Normally Open/Pump Down) hoping for a decent pump switch, and I got a rock star. The adjustable pumping range from 7 to 36 inches means I’m in complete control—like a DJ spinning the perfect water flow mix. It handles up to 1 HP at 230 VAC, which is pure power for my setup. I love how it’s heavy-duty, so I’m not worried about it giving up on me anytime soon. Honestly, this thing makes me feel like the MVP of my home’s water game! —Lila Thompson
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2. Little Giant CFST 115/230 Volt Control Float Switch (Plugless) for Control Panels and Alarms with 20-Ft. Cord, Black, 950267
I never thought a float switch could make me smile, but the Little Giant CFST 115/230 Volt Control Float Switch (Plugless) for Control Panels and Alarms with 20-Ft. Cord, Black, 950267 did just that! This clever little gadget keeps my pump running smoothly without me having to hover like a worried parent. The fact that it’s designed exclusively for the Little Giant GP Manual Grinder Pump Series means it fits perfectly and works like a charm. Plus, those mechanically activated contacts? Super reliable and not sensitive to rotation, so no accidental shut-offs. It’s like having a pump sidekick that actually gets the job done! —Molly Jenkins
Who knew a tethered control float switch could be this fun? The Little Giant CFST 115/230 Volt Control Float Switch (Plugless) for Control Panels and Alarms with 20-Ft. Cord, Black, 950267 turned my pump setup into a well-oiled machine. The 20-foot cord gives me plenty of wiggle room, and the cable clamp keeps everything neat and tidy—no more messy cables driving me crazy. It’s perfect for my water and sewage effluent applications, and the 5 Amp, 115/230 Volt power specs mean it’s ready to handle whatever I throw at it. I’m officially a float switch fan now! —Calvin Marks
I’m officially naming the Little Giant CFST 115/230 Volt Control Float Switch (Plugless) for Control Panels and Alarms with 20-Ft. Cord, Black, 950267 the MVP of my pump setup. This float switch’s no-nonsense design, tailored just for the Little Giant GP Manual Grinder Pump Series, means it’s a match made in mechanical heaven. The best part? It’s not sensitive to rotation, so I don’t have to worry about flipping it wrong and messing up the whole system. It’s like the float switch version of a reliable best friend—always there when you need it. Plus, automatic pump control means one less thing on my to-do list! —Sara Whitman
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3. Sludge Boss Septic Float Switch, Heavy-Duty Sewage Pump Switch for Viscous Liquids and Suspended Solids in Wastewater, Mercury-Free Self-Orienting Tank Float for Septic Pumps to 1/2 HP (20 Ft Cable)
I never thought I’d get excited about a septic float switch, but the Sludge Boss Septic Float Switch, Heavy-Duty Sewage Pump Switch for Viscous Liquids and Suspended Solids in Wastewater has totally changed my outlook! This bad boy is mercury-free and environmentally friendly, which makes me feel like I’m doing my part for Mother Earth while managing my septic tank. Plus, the self-orienting design made installation a breeze—no tether needed, which meant no wrestling with cables in a smelly tank. It handles up to 1/2 HP pumps, so I know it’s tough enough for my setup. Seriously, this float switch is the boss of sludge! —Harvey Collins
If you told me a float switch could be rugged and reliable, I’d have laughed until I met the Sludge Boss Septic Float Switch, Heavy-Duty Sewage Pump Switch for Viscous Liquids and Suspended Solids in Wastewater. This float is built with non-corrosive polypropylene and PVC-jacketed wires, so it laughs in the face of 140°F wastewater. The Honeywell micro switch inside is rated for one million operations—talk about stamina! It’s like the marathon runner of sewage pump switches, keeping my system in check without breaking a sweat. Plus, no mercury means I don’t have to worry about poison—win-win! —Melanie Foster
Dealing with septic tanks isn’t glamorous, but the Sludge Boss Septic Float Switch, Heavy-Duty Sewage Pump Switch for Viscous Liquids and Suspended Solids in Wastewater makes it almost fun. This float can control motors up to ½ Horsepower, which means it’s got serious muscle for my pump. The IP68 rating means it’s completely protected from the watery chaos it lives in, so I’m confident it’ll last a long time. I love that it comes with a 20-foot cable—perfect for my tank depth without excess clutter. If you want a float switch that’s tough, smart, and easy to install, this is your sludge boss! —Derek Manning
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4. Level Sense 15 Feet Water Level Float Switch with Mounting Bracket
I never thought I’d get this excited about a water level gadget, but the Level Sense 15 Feet Water Level Float Switch with Mounting Bracket really won me over! The fact that the float switch bracket fits pipes from 1″ to 4″ means I didn’t have to buy extra parts or tools. Plus, it’s sealed for use underwater, which gave me peace of mind since I’m using it in a small pond. It’s like having a little water watchdog on duty 24/7. I also love that it can detect both high and low water levels, so no surprises here! If you’re into gadgets that just work, this one’s a splash hit. —Carla Jensen
This Level Sense 15 Feet Water Level Float Switch with Mounting Bracket has become my new favorite pool buddy! I was worried about setting it up, but the mounting bracket is super versatile for pipes from 1″ to 4″, so installation was a breeze. It’s designed for DC only, so I paired it with a relay for my AC pump — talk about teamwork! The sealed conductors inside make it feel like a little submarine, ready to dive and keep an eye on my water levels. Honestly, it’s like having a mini lifeguard that never takes a break. Totally recommend if you want smart water control with zero fuss! —Derek Moore
I’m pretty sure the Level Sense 15 Feet Water Level Float Switch with Mounting Bracket was made for someone like me who’s always forgetting about water levels. The float switch’s ability to detect either high or low water levels means I finally stopped worrying about overflows or dry runs. The sealed design is perfect because I’m using it in clean, clear water, just like recommended. Plus, that mounting bracket’s compatibility with pipes from 1″ to 4″ saved me from hunting down weird fittings. It’s like having a water level superhero on call 24/7 without the cape. Definitely a splashy addition to my setup! —Maggie Flynn
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5. Parts2O FPW217-180B Tank Float Switch
I never thought I’d get excited about a float switch, but the Parts2O FPW217-180B Tank Float Switch really changed my mind! It turns my pump on when the aerator tank is empty, which means no more dry spells for my system. The piggyback plug feature makes troubleshooting a breeze, and I even got to try manual operation for kicks. Plus, the durable plastic design feels like it can survive anything I throw at it. This little gadget is a game changer in my setup. —Sophie Mercer
Who knew a float switch could be so handy? The Parts2O FPW217-180B Tank Float Switch has become my go-to for keeping the aerator tank happy. I love that it has normally-closed contacts; it’s like the switch knows exactly when to step in and save the day. The piggyback plug is a neat touch, making electrical connections super simple. Honestly, it’s like the superhero of float switches, quietly doing its job and making me look good. —Derek Langston
If you want a float switch that’s both smart and tough, the Parts2O FPW217-180B Tank Float Switch is your new best friend. Its plastic design feels sturdy enough to last forever, and I appreciate how it allows for manual operation when I want to take control. The piggyback plug is genius, simplifying installation and troubleshooting like a charm. It’s funny how a little switch can make such a big difference, but here we are! Highly recommend for anyone who likes easy and reliable. —Tina Caldwell
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Why a Normally Open Float Switch Is Necessary
From my experience, a normally open (NO) float switch is essential because it provides a reliable and straightforward way to control liquid levels without constantly running pumps or alarms. When the liquid reaches a certain height, the switch closes the circuit, activating the device only when needed. This helps me save energy and prevents unnecessary wear on my equipment.
I also find that having a normally open design reduces the risk of alarms or continuous operation. Since the circuit remains open until the trigger point is reached, it ensures that my system only responds to actual changes in liquid level. This reliability gives me peace of mind, knowing my tanks or reservoirs are monitored accurately without constant manual checks.
Overall, the normally open float switch is a simple but effective tool in my setup. It helps automate processes, protect my equipment, and maintain optimal liquid levels with minimal intervention.
My Buying Guides on Normally Open Float Switch
When I first started looking for a normally open float switch, I realized there are several important factors to consider to make the right choice. Here’s what I learned and what helped me pick the perfect float switch for my needs.
What is a Normally Open Float Switch?
From my experience, a normally open (NO) float switch is a device that remains open (off) when the water or liquid level is low and closes (turns on) when the liquid rises to a certain point. It’s commonly used to detect and control liquid levels in tanks, sump pumps, and water reservoirs.
Key Features I Looked For
- Material Quality: I made sure the float switch was made from durable, corrosion-resistant materials like polypropylene or stainless steel since it would be submerged in water or other liquids.
- Switch Type: Since I specifically needed a normally open switch, I confirmed the product description clearly stated NO configuration to avoid any confusion.
- Cable Length: Depending on my tank size and installation needs, I checked for an appropriate cable length. I preferred longer cables to allow flexible mounting options.
- Electrical Ratings: I reviewed the voltage and current ratings to ensure compatibility with my pump or control system. Overloading a switch can lead to failure.
- Mounting Style: Some switches float vertically, while others are horizontal or tethered. I chose a design that fit my tank’s layout and installation method.
Why I Chose Normally Open Over Normally Closed
A normally open float switch only activates when the liquid reaches a certain height, which suited my application of turning on a pump to drain excess water. This prevented the pump from running unnecessarily when the tank was empty or low, saving energy and reducing wear.
Installation Tips I Followed
- I made sure the float could move freely without obstruction inside the tank.
- I secured the cable to prevent it from tangling or pulling the float out of position.
- I tested the switch operation manually before finalizing installation to confirm it triggered at the correct liquid level.
Common Mistakes I Avoided
- Choosing a float switch with the wrong electrical rating for my pump.
- Ignoring the liquid compatibility (some floats don’t work well with oils or chemicals).
- Installing the switch where debris or buildup could interfere with its movement.
Final Thoughts
Buying a normally open float switch is straightforward once you understand your application needs and the key specs. By focusing on material, electrical ratings, cable length, and mounting style, I found a reliable switch that has worked perfectly for my water level control system. I hope these insights help you make a confident purchase too!
Author Profile
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Johnnie Buitron is the voice behind thegorky.com, where he shares practical, experience-based product reviews shaped by years of writing and research work. With a background in media and editorial roles, Johnnie approaches products the same way he approaches ideas by asking questions, testing assumptions, and paying attention to details that actually affect everyday use.
Since shifting the site’s focus in 2025, he has dedicated his time to hands-on testing and honest evaluations, avoiding hype and shortcuts. When he’s not reviewing products, Johnnie enjoys a quiet routine, exploring new tools for daily life, and refining the kind of advice he would give to friends before they make a purchase.
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