The Model WLS has a bushing with 1 1/2" American Standard Pipe Threads for mounting in steel tanks. A 1 1/2" x 2" adapter bushing is available for mounting in existing 2" steel flanges.
The unit is capable of detecting the level of water before a 3" (7,6cm) rise and/or a 3" (7,6cm) fall in the water level in a pressure tank, as required. he Model WLS Water Level Switch is a float operated device for supervising water level in a sprinkler supply gravity or pressure tank.
