Guantee That the return pipe to the pool constantly remains open when using the pool vacuum – the return is definitely the pipe that prospects through the multivalve into the pool and has no sight glass. You set the multport valve (MV) around the sand filter procedure to filtration, and https://lorenzo2jvfp.amoblog.com/the-smart-trick-of-swimming-pool-maintenance-that-no-one-is-discussing-54159864