White dry well housing designed for thru-wall installation of 3/8" temperature sensing bulbs. Compatible with temperature sensors from Balboa, Gecko, Hydro Quip, and other leading spa control manufacturers. Requires 1-1/4" mounting hole for installation.
| Thermowell Type | Thru-Wall |
| Sensing Bulb Size | 3/8" |
| Depth | 2-3/4" |
| Thru-Wall Hole Size | 1-1/4" |