Im relacing a bad water pressure tank. Should I replace also the 25 y.o valve?

Hi Martin. Thanks for your recent inquiry with Lowe's. I think it would be a great idea to update your system and replace your old relief valve as there could possibly be some sediment or corrosion in the old valve which could allow for a malfunction. If you have any further questions please give our customer support team a call at 800-346-7611