Balboa Super Duplex System circuit board, also known as the M1. This classic circuit board was used industry wide and supported up to 2 pumps. Works with any Duplex Digital topside control panel. If replacing an HS50R1C system with a circ pump this new board will make your pump #1 a single high speed pump.

This generic Balboa model will replace many OEM models that are no longer made such as: 50973 , 51674 , 51686 , 54091, 51692 , 51766 , 51786 , 51793R , 51859 , 52299 , 53183 , 611154 , 9710-15 , B2DGDPR2A , BAL54091 , BH50D , BSEV50 , BSUN50D , CAT100R1(x) , CAT100R1A , CAT100R1B , CS5000R , ELE09100205 , GRDELTR1(x) , GRDELTR1A , H50DR1A , H50DR2 , H50DR2A , HPL1000R1C , HS50R1B , HS50R1C , LB102R1A , LB102R1C , M1R1(x) , M1R1B , MAS200R1B , MAS225R1A , MAS225R1B , MIL75R1B , Q2002R1A , WS75R1B

Please Note: Circuit boards are a final sale and cannot be returned