Hydro Quip Watkins Double Barrel Heaters Manifold Kit (48 0041 K) jacuzziwhirlpool and SPDT relationship gives this and SPDT relationship gives this timer its practical value because timing components need to match the original switching style and electrical role closely if the final repair is going to feel right This type of component is especially useful when maintaining an M Class spa with a three pump layout and a direct fit replacement is preferred This replacement is especially useful when the original manifold components are cracked Choosing a matched kit can make service work more efficient and improve confidence in the finished repair