on the ss2 safety switch does it have a normally open contact or is it normally closed?

The switch is normally closed. When water raises the float this opens the connection. These float switches go bad every so often. In the case where the switch has gone bad and you are sure you do not have condensate clog in your line, you can cut the wire at the top of switch and twist together the wire to the unit and cover with a wire nut. You are going to have the switch replaced anyway, so you might as well enjoy your A/C without paying for an emergency visit from your local HVAC professional. Do this only if you are 100% sure you do not have a clogged line. I take no responsibility if your line is clogged and you suffer water damage.

Can this be put into a secondary drain pan that sits under the ac?

I don't see why not. Just make sure you have the wiring set up correctly to shut down the unit. I assume there is another switch in the primary drain pan.

Can the float level be adjusted, by rotating the float shaft on a thread(?), or ?

No, I don't believe it is adjustable. Since it is designed as a type of safety switch (to turn off AC unit) there isn't a need to adjust.

What is the inside diameter of the pipe that the switch slides into? Does the switch use a float?

3/4 inch id. switch does use a float

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RectorSeal Safe-T-Switch 97637 Condensate Overflow Switch, Easy Access, Condensate Drain Shut Off System, Magnetic Reed Switch, HVAC, Includes 3/4" Adapter

Product ID: 6446448

Details

Brand
Rectorseal
Connector Type
Adapter
Contact Type
Normally
Current Rating
250 A
Item dimensions L x W x H
2 x 5.5 x 8.25
Material
Plastic

⚡24V AC, 1.25A power rating

🔧3/4" adapter for versatile install

🧲Magnetic reed switch tech

EC$203

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Description

🛠️ Stay ahead of HVAC failures with smart condensate protection!

EFFORTLESS INSTALLATION - Compact L-shaped design with included 3/4" adapter fits auxiliary drain outlets—even in tight spaces.
TRUSTED BY PROFESSIONALS - RectorSeal’s industry-leading quality trusted by HVAC and plumbing experts nationwide.
RELIABLE MAGNETIC REED SWITCH - Off-center installation works flawlessly thanks to advanced magnetic sensing technology.
CLOG DETECTION SYSTEM PROTECTION - Automatically shuts off HVAC when condensate drain clogs, preventing costly water damage.
ADJUSTABLE FLOAT EASY MAINTENANCE - Quick-access float switch allows fast servicing without system disruption.

The RectorSeal Safe-T-Switch 97637 is a magnetic reed condensate overflow switch designed for HVAC systems. It detects clogged air conditioner condensate drains and automatically shuts off the system to prevent water damage. Featuring a compact L-shaped design with a 3/4" adapter, it installs easily on auxiliary drain pan outlets, even in tight spaces. The adjustable float switch allows quick maintenance access, while the magnetic reed technology ensures reliable operation even when installed off-center. Operating at 24V AC and 1.25A, this switch is a trusted solution for professional tradesmen in HVAC, plumbing, and electrical markets.

Specifications

ASIN	B005D4RFEM
Actuator Type	Magnetic Reed
Best Sellers Rank	#100,890 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #203 in Electrical Outlet Switches
Brand Name	Rectorseal
Circuit Type	1-way
Color	White
Compatible Devices	HVAC devices (Air Conditioners, Heat Pumps, Furnaces)
Connectivity Protocol	X-10
Connector Type	Adapter
Contact Material	Plastic
Contact Type	Normally Closed
Control Method	Touch
Control Type	Water Level
Current Rating	250 A
Customer Reviews	4.7 4.7 out of 5 stars (1,632)
Global Trade Identification Number	00021449976374
International Protection Rating	IP53
Item Dimensions	2 x 5.5 x 8.25 inches
Item Weight	7.36 ounces
Lower Temperature Rating	25 °F
Manufacturer	Rectorseal
Material Type	Plastic
Model	97637
Mounting Type	Wall Mount
Number of Items	1
Number of Positions	2
Operating Voltage	110 volts
Operation Mode	ON-ON
Part Number	97637
Switch Type	Reed Switch
Terminal	Solder
UPC	021449976374
Unit Count	1 Count
Upper Temperature Rating	125 °F
Wattage	30 watts

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EC$203

Duties & taxes included

In stock

Sold byAmazon Saint Vincent and the GrenadinesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Saint Vincent and the Grenadines.

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TrustScore 4.5 | 7,300+ reviews

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