Just had a plumber install a flush mounted supply/drain box in the wall between studs. He said the 28 inch height of the top of the standpipe would not be a problem re siphoning. Now, before sheetrocking, I looked at my Kenmore manual and it said Minimum height for top of standpipe should be 39 inches! This worries me. As a test, I filled the washer tub to "large load" level, but no siphoning occurred. Should I have the box raised the 11 inches anyway, just for safety, or should I buy Kenmore's siphon-breaker attachment for floor drains , and leave the plumber alone? Thanks!
- posted
20 years ago