Costco Sale: MJSI HydroFlush Toilet Conversion Kit $15.99 by Rhonda August 29, 2020 *UPDATE* 6/13/13. Costco has the MJSI HydroFlush Dual Flush & HydroClean Quiet Fill Valve Toilet Conversion Kit on sale for $15.99 (after manufacturer’s instant rebate), now through September 15, 2013. That … 0 FacebookTwitterPinterestEmail
