Dry well, water temperature control only, dry well sold separately.
Honeywell model # L4006A
100F to 240 F. Breaks circuit on a temperature rise to the control setting. They are used for a high limit or low limit control. Differential adjustment 5F to 30F
Fits Wood Doctor 15,25,40,50,70 & Polar RG5 MD9 LG15, Pacific Western PW34, PW1, PW2