- TX23U-IT -1500 & 1600 series
- TX55U-IT- 1900 series
- TX56U-IT- 2800 series
- TX63U-IT- 2812U-IT and some 2811U-IT
I needed this replacement part for my existing WS1515U-IT it has been outside in the elements for the past 11 years and it finally broke (the UV at 9,000' is murder on anything plastic) the rest of the system is still going strong!