No longer available in Nylon, this 3/4″mpt x 1/4″fpt PVC Bushing (pictured black, but will be white in color) – is used in the 3/4″ nylon tees of these larger fountains – Watermaster 54, 54D, 90, 96 to create an opportunity for constant flow heat using the PVC angle valve offered by Ritchie nowdays. This bushing and the PVC angle valve come in a kit or package if you would like to get both (#18458).