My aunt with the 1969 Speed Queen, her husband's family (his parents, two sons, and their kids) had a dairy and agriculture operation. His parents had Speed Queen laundry in their separate wash-house and presumably also the other son. It was never directly discussed with auntie but she never mentioned a problem with sediment and I didn't notice any when examining her machine during visits and occasionally being treated to running a load. Auntie's SQ set ran into the late 70s or early 80s, replaced with a WP belt-drive (still the SQ dryer). I have no details on any SQ repairs or what led to its replacement but uncle once mentioned he replaced the belt on the WP and it was quite a chore, LOL. The WP washer and SQ dryer were replaced with a 2002 Maytag PAV/PYE pair, which then were replaced with a 2012 Duet pair when the 'tag washer caught a bad pump (which I repaired and sold the 'tags for them).