Harwil Flow switch MOST COMMON

Harwil Reed Flow switch common to systems using Gecko and Hydroquip electronics and Laing heaters.

EXTREMELY IMPORTANT :

ALL HARWIL SWITCHES CARRY THE SAME Q-12DS CODE. You MUST identify by the dimensions.

Do not go blindly buying based solely on the Q-12 code

Thread diameter : 1" - 26mm

Grey probe length : 1" - 26mm 

Always found screwed into a "Tee" plastic housing - see pictures.

Supplied with 4" of cable and a plug.

(Does not come with a tee - this product is only the switch - there is no need to buy the tee unless your is cracked or damaged)

THIS IS THE MOST COMMON HARWIL - but CHECK !!!!