Waterway Front Acccess Skimmer Body [Short Throat (515 1100) tools Matching the original connection style Matching the original connection style often helps make the replacement more straightforward and less disruptive The Valterra Santoprene 1008C 7N valve seal is designed for compatible 6 inch and 8 inch slip valve applications where large line shutoff depends on a properly functioning internal seal The Waterway 515 1100 front access skimmer body is designed for compatible short throat applications This Waterway replacement is especially practical when the original front access skimmer body needs a correct short throat version rather than a generic substitute