Additional Drilling Equipment - Brand New Merrill 20/40 pressure switch (MPS2040). Low pressure preset at 20psi and high pressure at 40psi. Switch can be adjusted. Instructions in lid . You will receive one 20/40 switch. . CHECK OUT MY OTHER ITEMS FOR MORE WATER WELL SUPPLIES. THANKS FOR YOUR INTEREST IN OUR PRODUCTS. ATTENTION!! ALASKA,HAWAII & PUERTO RICO PLEASE EMAIL ME FOR A SHIPPING QUOTE BEFORE BIDDING OR BUYING!! WE ATTEMPT TO ANSWER QUESTIONS EVERYDAY, BUT DUE TO A HIGH VOLUME OF QUESTIONS IT MAY TAKE A FEW DAYS FOR US TO RESPOND TO YOUR QUESTION(S). THANK YOU FOR YOUR UNDERSTANDING. Location: Jennings, Oklahoma. For complete listing information please select the Click To Bid button to see this item on eBay.