compatible with Dometic 300 / 310 / 320 Models <br>Our flush ball seals / flush ball gaskets are compatible with Dometicâ„¢ 300,<br>310 and 320 RV, motorhome and trailer toilets. <br><br> High-Quality Material, Made To Last <br>Our valve seals are made from a high-quality, application-specific rubber blend<br>for optimal performance and a long-lasting lifespan.<br><br> DIY Install Saves Money <br>Don't go out and buy a new toilet or pay an arm-and-a-leg to change the seal!<br><br> Installation instructions: <br>1.) Turn off water supply.<br>2.) Hold the flush ball open by depressing the flush pedal.<br>3.) Grasp the underside of the old seal and pull towards you to remove.<br>4.) Clean the rim and bowl area where the old gasket previously sat.<br>5.) Release flush pedal and allow the flush ball to close.<br>6.) Clean the flush ball.<br>7.) With the flush ball closed, put the new seal in and press outwards<br> to ensure that it is firmly in place.<br>8.) Reopen the flush ball and spread a lubricant in the areas where the gasket<br> will contact the flush ball.<br>9.) Open and close the flush ball several times, then press down on the gasket<br> to ensure it is properly positioned.<br>10.) Turn on the water supply, add water to the bowl and ensure that there are<br> no leaks.<br><br>Note: Potential lubricants include silicone grease, petroleum jelly and spray silicone.