

HPI EVOLVE Water Sensor Attachment (Legacy)
The HPI EVOLVE Water Sensor Attachment (Legacy) — an in-line water-sensor adapter that splices into a radiator hose and takes a meter sensor without machining.
Brand: HPI
Product Name: HPI EVOLVE Water Sensor Attachment (Legacy)
Line: HPI EVOLVE Water Sensor
Sensor count: 1
Sensor thread: Rc1/8 (PT 1/8)
Kit contents: Body + 2 × hose clamps + 1 × R1/8 plug
Part Number: HPWA-## (legacy)##
Check hose inner diameter before buying — the adapter has fixed dimensions. Burn hazard — do not install on a hot engine.
An inline sensor adapter that lets you fit a 1/8 PT water-temperature or pressure sensor onto an existing radiator hose. No drilling, no welding — cut the hose, splice the adapter in with the included clamps, screw in the sensor to the sensor’s own torque spec, then re-fill and bleed the system.
Features:
- In-Line Install: Splices into the radiator hose with the included clamps.
- 1/8 PT Thread: Takes any standard 1/8 PT water sensor.
- Clamps Included: Two hose clamps supplied in the kit.
- Match Hose ID: Verify the inside diameter of your hose before ordering.
- Legacy Stock: Limited stock of the older design.
For adding water sensors to turbo cars without machining the block.

