Think Crucial Replacement for Hoover Hard Water Filter Fits Twin Tank Steam Mops, Compatible With Part # 440001633 HIGH QUALITY WATER FILTER that can replace your Hoover WH20200 TwinTank Steam Mop Hard Water filter. Get back to having a clean water to breathe again! HEALTHIER LIFESTYLE! Hard water can cause excessive mineral buildup on your steam cleaner. So if you don't keep your filter clean, your steam cleaner is going to run at much lower efficiency. Replacing your filter will help clean your water purifier's water and allow for a healthier lifestyle! EASY TO INSTALL so you can get back to cleaning as soon as possible! Simply remove your old filter and put this brand new one in it's place! Compare to Hoover Part No. 440001633. SAVE MONEY by using a new water filter! When your steam cleaner is dealing with scale buildup on its heating mechanism, it can cause it to work harder which will end up hurting your electric bill! GUARANTEED SATISFACTION because of a 30 day full money back guarantee and a trusted Think Crucial warranty. We are so confident in our products that we have no problem giving you every penny back if you're unhappy with your purchase. You won't see promises like that from big box brands!