Being offered for sale is the McDONNELL & MILLER "GUARD DOG" Model No. PS-851M-120 "LOW WATER CUT-OFF FOR HOT WATER BOILERS", as seen in the pictures/as described in the title. PLEASE SEE BELOW FOR IMPORTANT CONDITION NOTES. Being offered for sale AS-FOUND, uncleaned. May require a thorough detailing to bring to its full potential. SATISFACTION GUARANTEED or your money back...no questions asked!

Never used, brand new BUT since there's no packaging, it may have minor scuffs, scratches, stains, dings, dents, etc. throughout. NO probe included. See pics.

Please see ruler in pictures for size/scale reference. Additional measurements shall be provided upon request. Weighs 1 lb. 13.2 oz..