15 year old solenoid rusted inside from condensation and non use stuck in the open position, which is unusual as the are designed to fail closed. I overly researched. Trident had a batch of bad solenoids and they replaced some for the asking. Ultimately I got a trident from Defender knowing I could swap it out with them if anything happened. Ron Chappell who posts here and cruises in the Gulf of Mexico say he has to replace his every year or so because of condensation and carries spares.