Note: This is a water pump accessory suitable for HY1734 & HY1733-PART01 pressure switch is suitable for HY1734 and HY1733 Kohree RV water pump. KR2131-PART01 pressure switch is suitable for KR2131 Kohree RV water pump. Since accessories need to be stocked separately, please contact the customer service team via email at service@kohree.com before placing your order. Thanks for your understanding and cooperation!