I stupidly backwashed with the discharge valve closed...

It was just for 1 second, but I now have a leak from the top of the multiport valve. Can I replace just the top part, or do I need to replace the whole thing?

[Top part](https://www.amazon.com/262506-Compatible-pentair-Multiport-Tagelus/dp/B0DXB9SDP8/ref=sr_1_3?crid=3NCJR4N0CSZ1N&dib=eyJ2IjoiMSJ9.zb8a8X9EBd2OQQhP56SIophC2rFJKekdCvTRpFPLZkF5ldeI0DMu003pX2ChKK5q53Et9xcYbcWehJ_9oO8O6ZTq360WBGuSxXzSYRYsELk-4qBhuKLOKClFdz8oxSC-fZPQ_AQlTNlpb3i2onR6ahHCAD_Gv7Osgwos9Da8CcI8Oa5paKEXoHl2AOT-1p-J6RBE6MRdnSIcwur__UoNp_m4oQnqUZA58-zYEp6yGyk.10u5awWAjeyb5M_stPm1oMn8z4H0k29069u1kV7dEm0&dib_tag=se&keywords=multiport%2Bvalve%2Bfor%2Bsand%2Bfilter%2Bpentair&qid=1782402877&sprefix=multiport%2Bvalve%2Caps%2C204&sr=8-3&th=1)

[Whole thing](https://www.amazon.com/262506-Compatible-pentair-Multiport-Tagelus/dp/B0DX9H53BL/ref=sr_1_3?crid=3NCJR4N0CSZ1N&dib=eyJ2IjoiMSJ9.zb8a8X9EBd2OQQhP56SIophC2rFJKekdCvTRpFPLZkF5ldeI0DMu003pX2ChKK5q53Et9xcYbcWehJ_9oO8O6ZTq360WBGuSxXzSYRYsELk-4qBhuKLOKClFdz8oxSC-fZPQ_AQlTNlpb3i2onR6ahHCAD_Gv7Osgwos9Da8CcI8Oa5paKEXoHl2AOT-1p-J6RBE6MRdnSIcwur__UoNp_m4oQnqUZA58-zYEp6yGyk.10u5awWAjeyb5M_stPm1oMn8z4H0k29069u1kV7dEm0&dib_tag=se&keywords=multiport%2Bvalve%2Bfor%2Bsand%2Bfilter%2Bpentair&qid=1782402877&sprefix=multiport%2Bvalve%2Caps%2C204&sr=8-3&th=1)