Can i put drain out bathroom down the drain after using another drain cleaner? We would recommend the survey to be carried out prior to exchange of contracts or asap to prevent the slow down of any sale if defects are found. Hopefully this has done the trick once unblocked and flushable, give your toilet a really good scrub and clean using strong bleach, then air your bathroom well. Q how do i know how old my boiler is? Plumb tek is dedicated to providing round the clock emergency.